# 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

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1. ## 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
2. ## 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?
3. ## Calculus

Points (–1, 6) and (–3, 2) are endpoints of the diameter of a circle. (a) What is the exact length of the diameter? (Simplify as much as possible) Answer: ________ (b) What is the center of the circle? Answer: ____________ (c) What is the equation of
4. ## Math

Let A, C be the endpoints of the diameter of a circle and B an arbitrary point on the circle. Using the slopes of secant lines show that \ABC is a right angle. You can assume the circle is centered at the origin.
5. ## Geometry midpoint formula

A circle on the Coordinate plane has a diameter with endpoints at (6,8) and (15,8). What are the coordinates of the center of the circle? What is the radius of the circle? Identify the coordinates of another point on the circle. Explain how you found your
6. ## math

Line AB is the diameter of circle C. If the endpoints of the diameter are A(3, -4) and B(-2, 5), what are the coordinates of the center of the circle C? I've forgotten how to do this, heh heh... help please?
7. ## geometry

Name the diameter, radius, center, and the equation of the circle with a diameter that has endpoints at (-3, 4) and (5, -2).
8. ## Geometry

The endpoints of the diameter of a circle are at (1, 2) and (7, -6). What is the circumference of the circle, to the nearest tenth of a unit? 15.7 31.4 62.8 78.5 Please help?
9. ## geometry

The endpoints of the diameter of a circle are at (1,2) and (7,-6). What is the circumference of the circle, to the nearest tenth of a unit.
10. ## Geometry

The endpoints of a diameter of a circle are A(2,1) and B(5,5. Find the area of the circle in terms of pi.
11. ## Math

The points (4, –5) and (– 4, 1) are endpoints of a diameter of a circle. Find the center of the circle.
12. ## Geometry

The endpoints of a diameter on a circle are a(2,1)and B(5,5). Find the area of the circle in terms of 3.14.
13. ## geometry

If the endpoints of the diameter of a circle are (3, 1) and (6, 5), find the length of the diameter.
14. ## Geometry

the endpoints of the diameter of a circle are at (1,2) and (7, -6). what is the circumference of the circle, no the nearest tenth of a unit? 15.7 31.4 62.8 78.5 I was thinking B? i want to check.
15. ## math

The endpoints of the diameter of a circle are A(-1,1) and B(0.5,-3). calculate the radius of the circle.
16. ## geometry

a circle has diameter endpoints of A(5,10) and B(-3,4). what are the coordinates of the center of the circle
17. ## Mirielle

The endpoints of the diameter of a circle are (-6,2) and (10,-2). What are the coordinate of the center of the circle?
18. ## 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
19. ## 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.
20. ## math

A diameter of circle that has endpoints (-4,12) and (8,-2), as shown below, is in the standard (x,y) coordinate plane. What point is the center of the circle? Explain
21. ## 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?
22. ## Math

The endpoints of a diameter of a circle are (3, 4) and (7, –2). What is an equation of the circle?
23. ## Algebra

Points A(3,5) and B(7,10) are the endpoints of a diameter of a circle graphed in a coordinate plane. How many square units are in the area of the circle? Express your answer in terms of pi.
24. ## Circle geometry

The endpoints of the arms of an inscribed angle are the endpoints of a diameter. What is the measure of the inscribed angle? How do you know? Please help and please explain how I would draw a diagram of thus. Think you for your help!
25. ## math

show that x(-4,-3) and y(4,3) are endpoints of a diameter of the circle x^2 + y^2 = 25
26. ## Geometry HELP

What is the equation for a circle with a diameter having the following endpoints: N(0,1) and Q(18,1)? a.)(x - 9)^2 + (y - 1)^2 = 81 b.)(x + 2)^2 + (y - 7)^2 = 56 c.)(x)^2 + (y)^2 = 72
27. ## Hanus

points Q (10,8) and R (24,10) are the endpoints of a diameter of a circle centered at P. Line l is tangent to the circle at S (12,14). What is the y-intercept of line l?
28. ## algebra

Find the equation of the circle for which a diameter has endpoints P1(-1, 4) and P2(-5, 2).
29. ## geometry

the endpoints of the diameter of circle O are (-2,-1) and (-16,13). what are the coordinates of its center?
30. ## math

Find the equation of the circle with endpoints of diameter (-1,3) and (7, -5)
31. ## math

Find the length of the diameter of a circle whose endpoints are at (11, 4) and (10, 5).
32. ## 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

34. ## algebra

1)Write an equation for the parabola with focus (1,3)and vertex(0,3) answer= x= 1/4(y-3)^2 2)Write an equation for a circle if the endpoints of a diameter are at (1,1)and(1,-9) answer= (x-1)^2+(y+4)^2=25 3)Which is the equation of a circle with center
35. ## summer math hw

one circle has a diameter of 10 inches. a second circle has a diameter that is twice the diameter of the first circle What is the ratio of the area of the smaller circle to the larger circle
36. ## math

if A (2, -1) and B (4,7) are endpoints of a diameter of a circle, what is the area of the circle? a)16pi b) 17pi c) 18pi d)144pi e)1156pi Plot the two points and join 'em with a line. Now plot another point C (4, -1). And then simply run a line from B down
37. ## equation for circle

find the equation of a circle. the endpoints of the diameter of a circle are (3,-2) and (7,-6).
38. ## geometry

The endpoints of the diameter of a circle are at (1,2) and (7,-6). What is the circumference of the circle to the nearest tenth of a unit? a. 15.7units b. 31.4 units c. 62.8 units d. 78.5 units
39. ## math

Find the standard form of the equation of the circle with the given characteristics. Endpoints of a diameter: (1, −7) and (7, −5)
40. ## math

in circle p below the lengths of the parallel chords are 20,16, and 12. Find measure of arc AB..... the chord with a length of 20 is the diameter. the chords with lengths 16 and 12 are below the diameter torwards the bottom of the circle. arc AB is the arc
41. ## Geometry

in circle p below the lengths of the parallel chords are 20,16, and 12. Find measure of arc AB..... the chord with a length of 20 is the diameter. the chords with lengths 16 and 12 are below the diameter torwards the bottom of the circle. arc AB is the arc
42. ## Math

Triangle ABC is inscribed in a circle such that A and B are the endpoints of a diameter. CD is the altitude drawn to AB. If AC=15 and BD=16, compute the value of (AD*BC/CD)-3
43. ## Math - Equation of the circle

Find an equation of the circle whose endpoints of a diameter are (−3,6) and (5,−14). I tried to figure it out, but I'm not sure if my answer is correct. I got.. (x-2)^2 + (y + 4)^2 = 116 Any help would be great. Thank you!
44. ## Math

The endpoints of the diameter of a circle are at (1, 2) and (7, -6). What is the circumference of the circle, to the nearest tenth of a unit? A. 15.7 units B. 31.4 units C. 62.8 units D. 78.5 units I am confused. Please help me.
45. ## Geometry

In circle O, diameter RS has endpoints R(3a,2b-1) and S(a-6,4b+5). Find the coordinates of point O in terms of a and b. Express your answer in simplest form.
46. ## Geometry

Prove that the tangents to a circle at the endpoints of a diameter are parallel. State what is given, what is to be proved, and your plan of proof. Then write a two-column proof. Hint draw a DIAGRAM with the points labeled. Can some one please check for me
47. ## math

the number of noncollinear points needed to determine a circle Two. The location of the center, and one point on the circle (ie, the length of radius), you have determined the circle. However, the circle thus determined can be an an infinite number of
48. ## math

A shaded circle just fits inside a 2m x 3m rectangle. What is the radius in metres, of the largest circle that will also fit inside the rectangle but will not intersect the shaded circle? ------------------------------------------ I have a diagram with me,
49. ## Precalculus

A line segment has endpoints A=(1,3) and B=(13,19). a) Find the equation of the circle for which the segment AB is a diameter. Ans: (x - 7)^2 + (y - 11)^2 = 100 b) Accurate to the nearest tenth, the circumference of this circle is _______ ? I was able to
50. ## math

The circumference of a circle varies directly from its diameter. If the circumference of the circle having a diameter of 7cm is 7 cm, what is the circumferences of the circle whose diameter is 10cm? 18cm? 20cm? a. Write a mathematical statement that relate
51. ## Math

The circumference of a circle varies directly from its diameter. If the circumference of the circle having a diameter of 7cm is 7 cm, what is the circumferences of the circle whose diameter is 10cm? 18cm? 20cm? a. Write a mathematical statement that relate
52. ## Physics

you measure the diameter of a circle then you calculate the radius of the circle using this diameter. (1) Which one has a greater uncertainty, the diameter or the radius? Why? you measure the radius of a circle then you calculate the diameter of the circle
53. ## MATH HELP MS SUE OR SOMEONE

Is the following statement true or false? Justify your answer using what you know about diameters and chords. Every diameter of a circle is a chord. True. Every diameter of a circle is a chord. This is true because every diameter passes through the center
54. ## math

Is the following statement true or false? Justify your answer using what you know about diameters and chords. Every diameter of a circle is a chord. True. Every diameter of a circle is a chord. This is true because every diameter passes through the center
55. ## Math

If the diameter of a circle P is 40 percent of the diameter of circle Q, then the area of circle P is what percentage of the area of circle Q? Not enought information given right?
56. ## geometry

In cicrcle O, a diameter has endpoints (-5,4) and (3,-6). What is the length of the diameter?
57. ## Maths

1. In the xy-coordinate plane, point A is the midpoint of the segment with endpoints (2,4) and (-4,-4). What is the distance from point A to the origin? I know how to find the distance between the two points- 10. But I don't know where to go from there. 2.
58. ## geometry

For "circle"(O,r) , AP is the tangent at "A belongs to circle", from an exterior point P. Now, OP "intersection" circle = {B}. If BP = 1.6 = AB/5 , Then find diameter of the circle.
59. ## geometry

The sum of the diameter of 2 circles is 28". Once circle has a diameter that is 8" longer. What are the diameters of each circle?
60. ## college Algebra

Diameter of a circle.If the diameter of a circle is 1.3x10^-12 meters,then what is it's radius?
61. ## homework check

which if the following statements is false? a. The points of a circle are coplanar b. Concentric circles intersect in exactally one point c. In are AB C Denotes that an arc of the circle has endpoints A and C and that passes through B d. If a line and a
62. ## math

A circle has an area of 25 pi cm^2.If a circle is drawn within that circle with a diameter equal to the radius of the first circle, what is the area of the second circle? a. 2 1/2 pi cm^2 b. 4 1/4 pi cm^2 c. 5 1/4 pi cm^2 d. 6 1/4 pi cm^2 e. 7 1/2 pi cm^2
63. ## Plz Check my Geometry(sOo0n)

Out of 31 questions these are ones I struggled with. after the = sign is what I think the answer( except for #4, I don't know what to do at all), is so if I'm wrong can someone correct it with an explanation/formula with it please? 1.) Find the area of the
64. ## Plz Check my Geometry(sOo0n)

Out of 31 questions these are ones I struggled with. after the = sign is what I think the answer( except for #4, I don't know what to do at all), is so if I'm wrong can someone correct it with an explanation/formula with it please? 1.) Find the area of the
65. ## Math

Jason drew two circles. the diameter of the larger circle is twice the diameter of the smaller circle. What is the ratio of the circumference of the smaller circle to the circumference of the larger circle?
66. ## algebra

1)What is the distance between the museum and sailing club.I cant post the graph or anything but I have my numbers right its 53 but I used the distance formula so its either 53 units or the square root of 53 units. 2)Write the equation of the parabola y=
67. ## algebra

Find the standard form for the equation of a circle (x−h)^2+(y−k)^2=r^2 with a diameter that has endpoints (−8,−10) and (5,−4). Find the h= -1.5 k= -7 r=? I do not understand how to find the radius.
68. ## Physics

Piston Circle 1 in the figure below has a diameter of 0.29 in.; Piston Circle 2 has a diameter of 1.7 in. In the absence of friction, determine the force vector F necessary to support the 500-lb weight.
69. ## math

1. A(-3;4) is a point on a circle with centre at the origin. a.determine the coordinates of B, if AB is a diameter. b. Show that point C(0;5) lies on this circle. c.show that ACB has a magnitude of 90degrees. 2.a.ddetermine the equation of the circle with
70. ## Math

beverly, chris, pat, and sandy are andy's mother, father, sister, and brother. Sandy, who is the oldest, is not andy's father. beverly is older than pat and chris. pat is not andy's sister. what is each persons relation to andy? Why can nationalism be a

You are given two different circles. The diameter of the first circle is the radius of the second circle. What is the ratio of the area of the larger circle to the area of the smaller circle. Your answer should be in the form of a simplified fraction. I
72. ## Circle geometry

Please help Explain how I figure this out. A circle has diameter 70cm. A chord in the circle is 50cm long. How far is the chord from the center of the circle? I have been stuck on this for days. I appreciate any help. Thank you!!
73. ## math

The equation of a circle with centre O(0,0) is x^2+y^2=40. The points A(-2,6) and B(-6,-2) are endpoints of chord AB. DE right bisects chord AB at F. a)Verify that the centre of the circle lies on the right bisector of chord AB. b)Find the distance from
74. ## Algebra

The circumference of a circle is found by the formula C=pi(d) where d is the diameter of the circle. Does circumference vary directly as diameter? If so what is the constant of variation
75. ## 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
76. ## 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
77. ## geometry

2. For the circle with equation (x – 2)2 + (y + 3)2 = 9, answer each question: a) What are the coordinates of the center? none b) What are the radius and diameter of the circle? 360 c) Graph the circle.
78. ## math - grade 7

determine the diameter of a circle with a radius of 4.26m. determine the area of the circle with diameter is 8mm.
79. ## Alegebra 1

If all the vertices of a triangle are on the circle and one side of the triangle is the diameter of the circle it is a right angle. Find the length of the diameter (AC) if Ab =8 and BC = 15.
80. ## geometry

The area of a circle 200mm in diameter is approximately how many times greater than the area of a circle 40mm in diameter?
81. ## geometry

The radius of a circle is 10. Using π, which equation expresses the ratio of the circumference of the circle to the circle's diameter? please help me
82. ## Math: Geometry and Measurement

Find the area of each circle shown below. Also please tell me how to do it, and no false info please:) The image shows a) a circle with the diameter of 20 cm and b) a circle with the radius of 7 m.
83. ## Geometry

Solve for z. I got z=72 degrees and i don't know how I got it. The circle has diameter AB then another diameter CD. Arc AD = 40 degrees then angle DEB = 124 degrees and z = BC. The diameter DC intersects diameter AB. Please help i can't figure it out and
84. ## Plz Check my Geometry (Urgent)

***I know I've posted this several times but it's like getting skipped and or no one has gone over it so I'm posting it one more time before I go to bed. I need to have these checked by tommorrow PLEASE!*** Out of 31 questions these are ones I struggled
85. ## physical sciences

Imagine a circle with a diameter of 2km.if this represents an atom ,which answer would best represent the nucleus?choose the correct answer:a table tennis ball(diameter;2cm)atennis ball(diameter;7cm)avolley ball(diameter;20cm)a soccer ball(diameter;25cm)
86. ## Physics

I have to design a laboratory activity to answer the question, "What is the relationship between the diameter of a circle and the area of the circle?" My teacher said to use a previous activity as a templete to help me. For the previous activity you had to
87. ## Math

What is the center of a circle with endpoints (-4,3) and (6,-5)? Is it (2,-2)?
88. ## math

what is the expression for the area of the shaded region in the diagram in factored form? diagram: (shaded) Large circle have diameter of 8x (clear) small circle have diameter of 8y ___ my work: Area of large circle - Area of small circle Pi * 4^2 - pi *
89. ## math

The number of square units in the area of circle P is equal to the number of units in the circumference of circle P. Assuming that the diameter of the circle must be greater than P, what is the radius of circle P ? a. 2 b. 2 pi c. 4 d. 4 pi e. cannot be
90. ## Physics

Two positive charges q1 and q2 fixed to a circle. At the center of the circle they produce a net electric field that is directed upward along the vertical axis. Determine the ratio q2/q1. Angle for q1 is 30 degrees from diameter. Angle for q2 is 60 degrees
91. ## Math

Write the equation of a circle whose endpoints are (-1,2) and (5,8)
92. ## Geometri euclid

The small circle and the large circle have the same center O. Chord AB is tangent to the smaller circle at C. Prove that the area between the large and small circle is the same as the area of the circle that has AB as a diameter
93. ## math

circle O has a diameter D and circle P has a diameter d. the two circles are externally tangent. find the length of the common external tangent in terms of the circles' diameters
94. ## Math

If the diameter of a circle is 22 cm, what is the circumference of the circle and the area of the circle
95. ## Calculus

Estimate the area under the graph of f(x) = 2x^3 + 3 from x= -1 to x=5, first using 6 approximating rectangle and right endpoints, and then improving your estimate using 12 approximating rectangles and right endpoints. When using the left and right
96. ## Math Algebra

How can I solve this problem? A circle has diameter [AB]. The centre of the circle is (1,3), and B has coordinates (4,-1). # Find the coordinates of A. # Find the length of the diameter. HELP ME PLEASE
97. ## math

The diameter of the Earth is approximately 7920 miles. Given that the circumference of a circle is _ times its diameter, which statemnt best describles the length of a trip from Washington to Madagascar that is approximately 8600 miles long? Your question
98. ## 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
99. ## math

two circles intersect at point T.if the small circle has a raduis of 4 and C is the center of the larger circle,then the diameter of the larger circle must be 1]4 2] 8 3] 12 4]16 5] not enough information is given
100. ## Math: Area of Circles

Find the area of each circle shown below. The image shows a) a circle with the diameter of 20 cm and b) a circle with the radius of 7 m.