1. GEOMETRY

    The diameter of a circle has endpoints P(–10, –2) and Q(4, 6). a.Find the center of the circle. b.Find the radius. If your answer is not an integer, express it in radical form. c.Write an equation for the circle.

    asked by HELP PLEASE! on May 30, 2012
  2. Geometry

    Which one of these is NOT a step used when constructing an inscribed square using technology? A. Create a circle using the center with given points tool. B. Connect the points with a line through the center of the circle. C. Mark the points of intersection

    asked by Amy on January 20, 2015
  3. algebra

    A few more question Id like for someone to check please. 1) what are the vertex, focus, and directrix of the parabola with the given equation? x^2-8x-28y-124=0 vertex (4,-5) focus (0,7) directrix y=-12 2) write an equation of a circle with given center and

    asked by lee on February 22, 2013
  4. GEOMETRY INSCRIBED ANGLES MULTIPLE CHOICE QUESTION

    segment BC is tangent to circle A at B and to circle D at C. (Not drawn to scale) AB=10 BC=25 and DC=3. Find AD to the nearest tenth. Hint: Draw an auxiliary line from D to segment BA. {There are two circles, the larger one has point A in the center and a

    asked by aYaMe ;) on May 15, 2012
  5. math

    ABCDE is a circle with centre O. The diameter, AC, is extended to the point F so that CF = 16 cm. The line BF is the tangent to the circle at B and FDE is a straight line such that FD = 18 cm and chord DE = 14 cm (D and E are points of intersection of the

    asked by Valeriya on January 25, 2019
  6. math

    A segment with endpoints C(-3, 3)and D(7, 3) is the diameter of a circle. a. What is the center of the circle? b. What is the length of the radius? c. What is the circumference of the circle? d. What is the equation of the circle?

    asked by Joshua on March 21, 2018
  7. NEED MAJOR HELP! *QUADRATIC EQUATIONS*

    Write the equation for the circle with center at (- 8, - 6) and radius of 10. (x+8)² + (y + 6)² = 10 (x+8)² + (y + 6)² = 100 (x-8)² + (y - 6)² = 100 Find the standard equation for the circle with center on the positive x-axis and passing through the

    asked by Adrianna on March 20, 2012
  8. geomtry

    A diameter of a circle has endpoints P(-10,2) and Q(4,6) a. find the center of the circle. b. find the radius of your answer is not an interger express in radical form c. write an equation for the circle

    asked by gavin on May 22, 2015
  9. math

    -a circle with center at the point O(0,0) also has the point P(-2,3) on it. The equation of this circle is? and a second question: -A circle has a center of square root 5. The equation of this circle is? Please help me.

    asked by Garrick on October 9, 2008
  10. geometry

    Two circles of equal radius intersect each other such that each circle passes through the center of the other circle. Find the equation for the perimeter of this figure.

    asked by Leah on February 1, 2011
  11. Math

    I have a question my brother asked me but I need a math expert. You have two interlocking circles and the radius of circle B goes through the center of circle A and of course the radius of circle A goes through the center of circle B. The radius of each

    asked by DrBob222 on June 25, 2013
  12. Math (geometry)

    Line l is tangent to circle O at point P(3,4) where the center is located at (0,0). a. Find the radius of the circle. (I got 4) b. Give an equation of the circle. (I got x^2+y^2=16) c. Find the slope of line l. d. Give an equation of line l.

    asked by Emily on April 30, 2008
  13. sir steve reiny damon bob maths help steve!!!

    Point P(2,1) and Q(4,-5) lie on a circle. If line 2x-y-13=0 is a tangent to the circle at Q, what is (*) Coordinates of the center of the circle; (*) Equation of the circle. (*) Sketch out your circle. Step

    asked by yourim on April 28, 2017
  14. math

    Find the equation of a circle with radius 4 units ,whose center lies on the line 13x+4y=32 and which touch the line 3x+4y+28= 0.

    asked by kishor on January 3, 2016
  15. Math

    The equation 2x^2+2y^2+x+4y+2c=0 represents a circle.(let's name it S1) 1)Find the values of a,b and and show that c

    asked by Shenaya on July 31, 2017
  16. math

    can u help this the qustion is : A circle passes through the points (1,4)&(5,0) and its centre lies on the line x+y-3=0.Find (i) the equation of the circle and it parametric equations . (ii) the centre,diameter and area of the circle . (iii) the equation

    asked by steev on December 28, 2011
  17. steev

    can u help this the qustion is : A circle passes through the points (1,4)&(5,0) and its centre lies on the line x+y-3=0.Find (i) the equation of the circle and it parametric equations . (ii) the centre,diameter and area of the circle . (iii) the equation

    asked by math on December 28, 2011
  18. math

    ) An object is moving on a straight line which is 15 centimeters away from the center of a circle of radius 28 centimeters. (Both the circle and the straight line are on the same plane.) A source of light is located on the line drawn from the center of the

    asked by price on April 23, 2016
  19. math

    Let the equation of a circle be x^2+y^2-14x+8y+56 a. Find the standard form of the circle b. Find the center of the circle c. Find the radius of the circle

    asked by Anonymous on June 4, 2015
  20. Math (Pre Cal)

    Hi, I am studying for a precalculus quiz and I do not understand this hw problem: "The tangent line to a circle may be defined as the point that intersects a circle in a single point... If the equation of the circle is x^2+y^2=r^2 and the equation of the

    asked by Dealie on August 28, 2010
  21. Math

    write an equation which must be true if the line from p(x,y) to a(25,0) is perpendicular to the line from P(x,y) to the center of the circle x^2+y^2=400

    asked by Matt on March 23, 2013
  22. Geometry

    The diameter of a circle has endpoints P(- 10, - 8) ) and Q(4, 4) . a. Find the center of the circle. bFind the radius. If your answer is not an integer, express it in radical form. . Write an equation for the circle.

    asked by Amber on May 4, 2020
  23. mathematics

    The circle x2-2x+y2-4y-4=0 lies on the cartesian plane,question 2.1.1 equation of new circle which is the rotation of original circle through 180 degree around the origin...2.1.2 find equation of another circle which is the translation (x;y)-(x-8;y-6) of

    asked by Jossie on March 21, 2013
  24. maths

    1) Circle centre (7,-2) passes through (-2,10). Calculate radius and find equation of circle. 2) AB is diameter of circle A(9,5) B(-1,-7). Find equation of circle mid point. I know i have to use the eqn (x1+x2)/2 and (y1+y2)/2 3) Find the equation of

    asked by Anonymous on February 24, 2008
  25. Math

    Write the equation of the circle with center (-2,-3) and tangent to the line 2x+5y=10.

    asked by Hannah on January 25, 2009
  26. Analytic Geometry

    What is the equation of the circle touching the lines x-3y-11=0 and 3x-y-9=0 having its center on the line x+2y+19=0 .

    asked by John on May 5, 2013
  27. mathematics

    The circle x2-2x+y2-4y-4=0 lies on the cartesian plane,question 2.1.1 equation of new circle which is the rotation of original circle through 180 degree around the origin...2.1.2 find equation of another circle which is the translation (x;y)-(x-8;y-6) of

    asked by Jossie on March 21, 2013
  28. mathematics

    The circle x2-2x+y2-4y-4=0 lies on the cartesian plane,question 2.1.1 equation of new circle which is the rotation of original circle through 180 degree around the origin...2.1.2 find equation of another circle which is the translation (x;y)-(x-8;y-6) of

    asked by Jossie on March 21, 2013
  29. mathematics

    The circle x2-2x+y2-4y-4=0 lies on the cartesian plane,question 2.1.1 equation of new circle which is the rotation of original circle through 180 degree around the origin...2.1.2 find equation of another circle which is the translation (x;y)-(x-8;y-6) of

    asked by Jossie on March 21, 2013
  30. physics

    An object, after being released from its circular path, travels the distance OA in the same time it would have moved from O to P on the circle. The speed of the object on and off the circle remains constant at the same value. Suppose that the radius of the

    asked by Mary on February 21, 2007
  31. Algebra

    Find the equation for the circle with center (1,2) and passing through (-4,-3). Write the equation for the circle.

    asked by Jason on August 26, 2016
  32. college algebra-plz help

    a circle has the equation 3(x-5)^2_3y^2=12. Find the center and radius and graph the circle. find the intercepts, if any. plz show work

    asked by James on December 9, 2012
  33. Alg2

    The tangent to a circle may be defined as the line that intersects the circle in a single point, called the point of tangency. If the equation of the circle is x^2 + y^2 = r^2 and the equation of the tangent line is y = mx + b, show r^2(1 + m^2) = b^2

    asked by Allen on October 22, 2009
  34. College Algebra

    Write the equation of a circle in standard Find the center, radius intercepts and graph the circle. .........x^2+y^2-12x-4y+36=0

    asked by Mountain Scott on August 24, 2012
  35. Algebra

    2. Write the equation of the circle in standard form. Find the center, radius, intercepts, and graph the circle. x2+y2+8x+2y+8=0

    asked by Jeannette on December 2, 2013
  36. math

    Find the equation of the circle with center on the line x-2y+2=0 and which touchesboth positivex and positive y axes.

    asked by Anonymous on March 4, 2015
  37. Math

    I have a series of questions that I did. They lead up to the last question I can't solve. Could you check my math and help me with the last question? Thanks! a) Let a be the point (2,3). Compute the distance from Origin 0 to A answer: a^2 + b^2 = c^2 3^2 +

    asked by Shane on October 14, 2010
  38. Math (urgent)

    the equation x^2+y^=25 describes a circle with center at the origin and radius 5. The line y=x-1 passes through the circle. Using the substitution method, find the points at which the circle and line intersect. a) (4,3) and (-4,-3) b) (3,4) and (-3,-4) c)

    asked by Max on September 7, 2016
  39. calc

    standard equation of circle concentric with X^2+Y^2-2X-8Y+1=0 and tangent to line 2X-Y=3 Complete the squares to find the center of the circle. X^2+Y^2-2X-8Y+1=0 (x-1)^2+(y-4)^2 - 16 =0 The center is (1,4) and the radius for the given circle is 4. Now find

    asked by Melba on September 26, 2006
  40. maths-urgently needed

    find the equation of circle if the line 2x - y +1 = 0 touches the circle at the point (2,5) and the center of the circle lies on the line x+y -9 =0

    asked by Anonymous on February 14, 2013
  41. MATH

    How do i find the center of a circle using 3 points. Also need to find the radius and the equation of the circle.... My 3 points are (2,8) (-4,6) (1,-1) I found the Equation of the perpendicular bisector of the line between the first and second point which

    asked by B on September 25, 2014
  42. Algebra II

    In this set of eight problems, we have to match each equation with the correct description of its graph. However, these are test corrections I'm doing and I do not have the previous multiple choice answers so I can deduct from it, but can someone help me?

    asked by Emily on February 4, 2009
  43. Geometry

    Within an orthonormal system consider points A(1,4) B(5,1) C(4,8) (a)Calculate the angle ABC (b)Show that 3x+4y-19=0 is an equation for line L which passes through A and B (c)Find a vector equation for line L (d)(i)give an equation for the circle with the

    asked by Anonymous on May 4, 2008
  44. trig question

    On a unit circle, sin x = square root 3 over 2, with center O. Vertical line from top to center of circle is PO. Horizontal line from middle to right of circle is OE. Another vertical line of AB is parallel to PO. And radius of circle (line from O to A) is

    asked by Anonymous on April 28, 2012
  45. calc

    standard equations of circles that have centers on line 5x-2y=-21 and are tangent to both axis. Any ideas?? First express the line as in point slope form y=(5/2)x - 21/2 The center must be on the line, so it is a point expressed as (x,(5/2)x - 21/2) In

    asked by Melba on September 26, 2006
  46. trig question

    NEW DIAGRAM: On a unit circle, sin x = square root 3 over 2, with center O. Vertical line from top to center of circle is PO. Horizontal line from middle to right of circle is OE. Another vertical line of AB is parallel to PO. And radius of circle (line

    asked by Anonymous on April 28, 2012
  47. Please Help! Math

    How to find the center and radius of a circle using 3 points... My 3 points are (2,8) (-4,6) (1,-1) I found the Equation of the perpendicular bisector of the line between the first and second point which was y=(3/2)x + 5 And the Equation of the

    asked by B on September 25, 2014
  48. math

    a circle is tangent to the y-axis at y=3 and has one x-intercept at x=1 a) what's the other x-intercept b) what's the equation i have no clue how to solve this! You know that the center of the circle is somewhere in the line y = 3, denote the x-coordinate

    asked by Anonymous on August 4, 2007
  49. Geometry

    I have a circle with a Tangent line, DE, running along it and connecting with another line, FC, which runs through the center of the circle to the other side.I have connected the center of the circle with point E on the edge of the circle with a radius. I

    asked by Aaron on June 3, 2009
  50. Geometry

    I have a circle with a Tangent line, DE, running along it and connecting with another line, FC, which runs through the center of the circle to the other side.I have connected the center of the circle with point E on the edge of the circle with a radius. I

    asked by Aaron on June 3, 2009
  51. Analytic Geometry

    Find the equation of the circle with radius sqrt2 tangent to the line x+y=3 and having its center on the line y=4x

    asked by Lea on January 29, 2013
  52. college algebra

    1. for the given slope-inntercept equation of the line with the following properties parallel to the line y=7; containing the (-3,5) 2. write the equation of the circle in standard form. find the center, radius, intercepts. x^2+y^2+16x-18y+145=25 please

    asked by confused-steve please on December 3, 2012
  53. Analytic Geometry

    Find the equation of the circle, with radius 1, tangent to the line 3x+4y=5 and having its center on the line x+2y=0

    asked by xavier on January 31, 2013
  54. Math

    The points (4, –5) and (– 4, 1) are endpoints of a diameter of a circle. (a) Find the center of the circle. (b) Find the length of the radius of the circle. (Note that this is a distance.) Give the exact answer. Show work. (c) State the equation of the

    asked by Kate on June 24, 2009
  55. Calculus

    Find the equation of a circle with center C(1,6) and tangent line x-y-1=0.

    asked by Cad on July 29, 2011
  56. geometry

    A circle with center at (2,0) and a radius of 4 is intersected by a line whose slope is 1 and whose y intercept is 2. Write the equation of the line and write the equation of the circle in standard form. i know that the center-radius form is (x-2)^2 +

    asked by Anonymous on January 2, 2011
  57. Geometry

    Help please I'm stuck in this 3 problems. 1.Find the center and radius of the circle (x - 1)2 + y2 = 36 2.Find the distance between the two points. Round an approximate result to the nearest hundredth(8, 0) and (0, 6) 3.Give the equation of the line that

    asked by Lisa on September 6, 2009
  58. Math

    These questions that I have completed are on a test review for my exam and I would just like to know if they are correct. These are only a few of the questions, I have more that are just not complete yet. Thank You! 1) List the intercepts for the graph of

    asked by Hannah on October 6, 2010
  59. Math(Please check answers)

    These questions that I have completed are on a test review for my exam and I would just like to know if they are correct. These are only a few of the questions, I have more that are just not complete yet. Thank You! 1) List the intercepts for the graph of

    asked by Hannah on October 6, 2010
  60. math

    find the equation of the circle having center (3,4) & touches the line 5x+12y+11=0

    asked by himanshu on October 25, 2015
  61. MATH

    asked by thealmighty_.k on January 28, 2019
  62. Math

    asked by thealmighty_.k on January 23, 2019
  63. technical drawings

    a circle of diameter 80mm and a line BC. The ratio of the circle to the line BC is 7:5. what is the true length of the line from the center of the circle.2. what is the actual diamter of the cirlce. thanks

    asked by hendrix on May 5, 2016
  64. MATH NEED HELP

    asked by theeeeylovekikii on January 23, 2019
  65. math_pre-calc

    Find the equation of a circle that passes through the points (6,3) ans (-4,-3) and whose center lies on the line y=2x-7

    asked by Lenna on March 11, 2010
  66. Math~Geometry

    Find the circumference of the circle. Use 3.14 or pi. Round to the nearest unit. The circle has a line going through the center and under the line it says: 13 cm. A 16 B 41* C 20 D 62

    asked by Mr. Skill's101.4 on March 29, 2018
  67. Geometry

    A diameter of a circle has endpoints P(-10, -2) and Q(4, 6). a. Find the center of the circle. b. Find the radius. If your answer is not an integer, express it in radical form. c. Write an equation for the circle. Can someone explain how to do this?

    asked by Ember Lovet on May 16, 2018
  68. geometry

    This one is confusing me. please help The diameter of a circle has endpoints P(–10, –2) and Q(4, 6).Find the center of the circle.Find the radius. If your answer is not an integer, express it in radical form. Write an equation for the circle. Thanks

    asked by ryan on January 12, 2012
  69. Geometry

    A diameter of a circle has endpoints P(-10, -2) and Q(4, 6). a. Find the center of the circle. b. Find the radius. If your answer is not an integer, express it in radical form. c. Write an equation for the circle Can someone please help me by answering

    asked by Ti on April 16, 2020
  70. Math

    write an equation which must be true if the line from p(x,y) to a(25,0) is perpendicular to the line from P(x,y) to the center of the circle x^2+y^2=400

    asked by Matt on March 23, 2013
  71. math

    Write an equation of a circle with the center (-5,-4) and radius 6. The general equation for a circle is (x-a)^2 + (y-b)^2 = r^2, where r is the radius of the circle and (a,b) are the (x,y) coordinates of the center. Make the appropriate substitutions and

    asked by James on May 7, 2007
  72. maths

    1. Prove using mathematical induction that 1+2+3+...+n=[ n(n+1)]/2 2. Find the derivative of 2^x^2+log2(2x^2-1) 3. Use DeMeoivre's theorem to simplify the following expressions [(Cos pie/3 + isin pie/3)^5 (cos 2pie/3- isin 2pie/3)^4]/ (cos pie/6 - isin

    asked by muselitata on February 19, 2013
  73. maths

    1. Prove using mathematical induction that 1+2+3+...+n=[ n(n+1)]/2 2. Find the derivative of 2^x^2+log2(2x^2-1) 3. Use DeMeoivre's theorem to simplify the following expressions [(Cos pie/3 + isin pie/3)^5 (cos 2pie/3- isin 2pie/3)^4]/ (cos pie/6 - isin

    asked by muselitata on February 19, 2013
  74. Math

    The point P = (4, 3) lies on the circle x2 + y2 = 25. Find an equation for the line that is tangent to the circle at P. This line meets the x-axis at a point Q. Find an equation for the other line through Q that is tangent to the circle, and identify its

    asked by Matilda on April 20, 2017
  75. Math

    The point P = (4, 3) lies on the circle x2 + y2 = 25. Find an equation for the line that is tangent to the circle at P. This line meets the x-axis at a point Q. Find an equation for the other line through Q that is tangent to the circle, and identify its

    asked by Matilda on April 20, 2017
  76. Algebra

    1.How do I find the center of a circle using the points (2,8) (-4,6) (1,-1) ? 2. The Radius of the circle? 3. Equation of circle THANKS!

    asked by Please Help! on September 24, 2014
  77. College Algebra

    using the knowledge of systems of equations, and that the equation of a circle is (x-h)^2 + (y-k)^2 = r^2, where (h,k) is the center and r is the radius. Find the equation of a circle that contains the following points: (6,2), (4,6), and (-3,5). (These 3

    asked by Kevin on December 15, 2011
  78. College Algebra

    using the knowledge of systems of equations, and that the equation of a circle is (x-h)^2 + (y-k)^2 = r^2, where (h,k) is the center and r is the radius. Find the equation of a circle that contains the following points: (6,2), (4,6), and (-3,5). (These 3

    asked by Kevin on December 15, 2011
  79. Math

    Use 3.14 for π to estimate the area of a circle. The diameter is given. Round your answer to the nearest hundredth if necessary. A circle is shown. A dashed line extends across the circle through a point at the center connecting points on opposite

    asked by Billie Eilish 🖤 on May 9, 2019
  80. Advanced Math

    Find the equation of the circle where the center is on the line 8x + 5y - 8 =0 and passing through point (2,1) and point (3,5)

    asked by Mk on February 28, 2011
  81. math

    43. What is an equation of the circle that has its center at the origin and is tangent to the line y=3x 7?

    asked by Shelyn Yang on February 27, 2013
  82. Analytic Geometry

    What is the equation of the circle touching the lines x-3y-11=0 and 3x-y-9=0 having its center on the line x+2y+19=0

    asked by xavier on January 31, 2013
  83. Analytic Geometry

    What is the equation of the circle touching the lines x-3y-11=0 and 3x-y-9=0 having its center on the line x+2y+19=0

    asked by xavier on January 31, 2013
  84. Algebra Help

    How do I find the center of a circle using the points (2,8) (-4,6) (1,-1) I also found the Equation of the perpendicular bisector of the line between the first and second point which was y=(3/2)x + 5 And the Equation of the perpendicular bisector of the

    asked by Bri on September 24, 2014
  85. Algebra

    Could you please check some of my Algebra problems please? Write the standard form of the equation of the circle with the given center and radius. 1. (-7,4);8 I got (x+7)^2 + (y-4)^2=64 2. (-7,10); square root of 17 I got (x+7)^2 + (y-10)^2=17 3. (0,0); 2

    asked by Soly on September 10, 2007
  86. Equations of a Circle

    Write the standard for of the equation of the circle that passes through the points at (0,8),(8,0),and (16,8). Then identify the center and radius of the circle. I have r=8, center=(8,8). What now?

    asked by Some1 Help Me Plz on April 21, 2012
  87. maths

    Given that the equation of the circle is x^2 + y^2 +2x -8y+5 =0 (i)Find the centre and radius of the circle (ii)Determine whether the line x-3y=8 is tangent to the given circle

    asked by mazoe on February 27, 2012
  88. maths

    Given that the equation of the circle is x^2+y^2+2x-8y+5=0 (i)find the centre and radius of the circle (ii)Determine whether the line x-3y=8 is tangent to the given circle

    asked by tembo on March 14, 2012
  89. math

    Find the standard form of the equation of the circle with the given characteristics. Center: (5, -2); point on circle: (-3, -4)

    asked by mary on May 26, 2018
  90. Math

    (a) Straight line passes through the point (-2,8) and is parallel to the line x+2y=4 Slope Intercept Equation is: (b) Straight line passes through the point (-1,9) and is perpendicular to the line 5x+y=4 Slope Intercept Equation is: (c) Determine the

    asked by Yin on April 12, 2015
  91. Algebra

    Find the center and radius of the circle. Equation: x^2 + (y+7)^2=4 Formula for center at the origin is x^2+y^2=r^2 Is this what I use and how do I go about this?

    asked by Carrie on April 18, 2010
  92. Math

    write the equation of the circle in standard form. find the center, radius, intercepts, and graph the circle. x^2+y^2-6x-8y+25=36

    asked by Rachel on May 27, 2012
  93. college algebra

    write the equation of the circle in standard form find the center radius, intercept and graph circle x^2 +y^2+8x+2y+8=0

    asked by zachary on October 26, 2012
  94. Math

    The point (-4.3) lies on a circle whose center is at (2,1). Find an equation of this circle.

    asked by Adam on February 5, 2011
  95. Algebra

    The point (-1,0) lies on a circle whose center is at (-6,5). Find an equation of this circle

    asked by Jennifer on May 17, 2011
  96. Math

    A court is 94ft long by 50ft wide. It has 3 circles each 12ft diameter. Two of the circles are at the free throw line and the third is at the center of the court. Within the 3rd circle is another circle with a radius of 2ft.The key is rectangular region on

    asked by Kimberly on May 17, 2015
  97. Pre-Calculus

    I am having trouble with several problems: 1) Find the coordinates of the center, foci, and the vertices, and the equations of the asymptotes of the graph of the equation (x+1)^2/2 - y^2/8 =1 2) Write the standard form of the equation of the circle that is

    asked by Lucy on September 27, 2008
  98. Pre-Calculus

    I am having trouble with several problems: 1) Find the coordinates of the center, foci, and the vertices, and the equations of the asymptotes of the graph of the equation (x+1)^2/2 - y^2/8 =1 2) Write the standard form of the equation of the circle that is

    asked by Lucy on September 28, 2008
  99. Circles (Conic Sections)

    I have no idea how to do these problems: Find an equation of each circle. 1. Center (3,5); tangent to the x axis 2. Center (5,-3); tangent to the y axis 3. Tangent to the x axis, y axis, and the line y=5 (two answers) I just really need help understanding

    asked by Amanda on April 21, 2009
  100. pre calculus

    Write the equation of the circle in standard form. Find the center, radius, intercepts, and graph the circle. x^2+y^2-12x-4x+36=0 How on earth do I do this?

    asked by sharon on March 28, 2013