Ask questions and get helpful responses.

PQ and PR are tangents to the circle centred at O. If OPR = 45°, then prove that ORPQ is a square.

6,859 results
  1. Maths

    PQ and PR are tangents to the circle centred at O. If OPR = 45°, then prove that ORPQ is a square.
  2. math

    Okay, so there is circle S. There are two tangents of this circle that intersect, so it almost looks like a cone? the angle of the intersected tangents is 20º. The arc that the "cone" intersects is 4x. I have to figure out what X is. THe answer is 110 but
  3. maths

    The angle between two tangents from a point to a circle is 82 degree.What is the length of one of these tangents if the radius of the circle is 80mm?
  4. geometry

    Two tangents drawn to a circle from an external point intercept a minor arc of 150°. What is the measure of the angle formed by these two tangents?
  5. math

    in a fig.P,Q and R are points on a circle,center O.if OPR=36。what is the size of PRQ
  6. math

    A circle is inscribed in triangle ABC with sides a, b, c. Tangents to the circle parallel to the sides of the triangle are constructed. Each of these tangents cuts off a triangle from ∆ABC. In each of these triangles, a circle is inscribed. Find the sum
  7. calculus

    5. Consider the circle x2 + y2 = 16 and the parabola y2 = 8x. They intersect at P and Q in the first the fourth quadrants, respectively. Tangents to the circle at P and Q intersect the x-axis at R and tangents to the parabola at P and Q intersect the
  8. math

    A circle with diameter r is internally tangent to a circle with radius r at the point T. For some other point S on the larger circle, chord ST intersects the smaller circle at point X, and the tangents to a larger circle at S and T meet at point Y. Show
  9. math

    ABC is a sector of a circle with radius R and center C. The arc DE lies on a circle also centred at C. If DE divides ABC into two regions of equal area, find the length of CD in terms of R
  10. geometry

    AB and AD are tangents of the circle with the center at C. The measure of BDC = 45o, and the circle has a diameter of 4. Which is the length of AB?
  11. Math

    There are two tangents to the circle of radius centered at (0, - 1) that pass through the point (0,1). What are their equations? Equation of a circle x^2+(y+1)^2=1^2
  12. math

    ) A chord AB of length 13cm is drawn in a circle centre O at a distance of 5cm from O. Find the radius of the circle. Stop at 1 d.p.(b) TA and TB are tangents to a circle centre O. TOC is a straight line and
  13. math

    For n ≥ 3, the sequence of centred n-gon numbers is found by starting with a central dot, then adding layers consisting of n-gons of dots around this centre, where the number of dots on each side increases by 1 for each layer. For instance, the sequence
  14. geometry

    two tangents to a circle form an angle of 105 degrees. find the length of the major arc if the radius if the circle is 10 inches
  15. Geometry

    AC and AE are common external tangents of circle G and circle D. FE = 26, GF = 5, and AG =13. What is the measure of AC?
  16. math

    Given that AC and AE are common external tangents of circle G and circle D, FE = 15, GF = 3, and AG = 5, which is the length of AC?
  17. Math

    Given that AC and AE are common external tangents of circle G and circle D, FE = 15, GF = 3, and AG = 5, which is the length of AC?
  18. Math

    Two lengths are drawn from a Point P to a circle centre (o). The radius of the circle is 8.2cm and P is 12.4cm from o. Find the angle between the tangents. Please help, I really don't understand it.
  19. Pre-Calculus

    Not sure what to solve... I tried to solve it but i ended up proving that it worked. a. Find the equations of the tangents at C (-2,1) and D (1,2) on the circle x^2+y^2=5 b. Find the point of intersection of the tangents. ~What I did was find the slope and
  20. maths

    Two tangents XY and XZ are drawn from a point X to a circle with center W.If the length of XZ is 156 and the length YZ is 120,find the radius of the circle.
  21. Mathematics

    In the circle,identify the secants and the tangents
  22. pre-calculus

    tangents are drawn from the point (-4,0) to the circle x^2 +y^2 =1. find the slopes of the tangent.
  23. math

    From an external point E, tangents ES and ET are drawn to circle O. if m
  24. Math

    You can use triangle congruence theorems to prove relationships among tangents and secants. Task 1 Four tangents are drawn from E to two concentric circles. A, B, C, and D are the points of tangency. Name as many pairs of congruent triangles as possible
  25. maths

    in the following fig two tangents PQ and PR are drawn to a circle with centre O from an external point P.prove that QPR=2OQR
  26. business

    Diversity. Topics centred in diversity may take the form of historical reviews which argue how key historical events or changes in values have influenced changes in the make-up of workers. Alternately, these topics may be centred in arguments about team
  27. Geometry

    Four tangents are drawn from E to two concentric circles. A, B, C, and D are the points of tangency. Can you name as many pairs of congruent triangles as possible and tell how you can show each pair is congruent? You can use triangle congruence theorems to
  28. math

    PQ is a chord of length 8 cm of a circle of radius 5 cm . The tangents at P and Q intersects at T. Find the length of TP.
  29. maths-geometry

    Construct ∆ABC, AB=6cm, BC=9cm,CA=8cm. construct tangents from the vertex C to the circle through AB as the diameter
  30. calculus

    the line y=x-c touches the ellipse 9x^2 + 16y^2 = 144. Find the value of c and the coordinate of the point of contact. a parallelogram is defined by two sets of tangents to the curve x^2 - 4y^2 = 9. The gradients of the tangents are 1 and -1. Find the area
  31. calculus

    conic sections question 1: verify that the point (3,2) lies on the circle x^2+y^2-8x+2y+7=0, and find the equation of the tangent at this point. question 2: find the length of the tangents from the point (5,7) to the circle x^2+y^2-4x-6y+9=0 question 3:
  32. math

    ab and ac are tangents to a circle with centre o. if angle bac is equal to 40 degree, find angle abc and angle acb.
  33. calculus

    there are two tangents lines to the curve f(x) = 3x^2 that pass through the point p =0,1 find the x coordinates of the point where the tangents line intersect the curve
  34. Calculus

    If tangents to the curve defined by y=x^2+4 ln x are parallel to the line defined by by y-6x+3=0, determine the points where the tangents touch the curve. y’=2x+4/x 2x+4/x=6 What do I do next?
  35. Maths

    Points A,B,C are given on circle Γ such that AB=BC. The tangents at A and at B intersect again at point D. The line CD intersects Γ again at E. The line AE intersects BD at F. If AD=120, what is the length of FB.
  36. Calculus

    A differential equation that is a function of x only a.will produce a slope field with parallel tangents along the diagonal b.will produce a slope field that does not have rows or columns of parallel tangents c.will produce a slope field with rows of
  37. calculus

    Find the coordinates of points where the graph of f(x) has horizontal tangents. As a check, graph f(x) and see whether the points you found look as though they have horizontal tangents. f(x) = −x3 + 6x2 − 9x + 13 (x, y) = ( ? ) (smaller x-value) (x, y)
  38. Language Arts

    Do you have any book reviews opr book reports on Sharon Draper's Darkness Before Dawn?
  39. English

    Oprah Winfrey ======== How do you pronounce "Oprah"? 1. 'oupr... 2. 'opr.. 3. 'apr...
  40. maths-circles

    a circle having a centre O has a triangle PQS inside it with the base QP is not on centre O. PT and QT are two tangents from an exterior point T (S, O and T are linear points - lie in one line ) it is given that angle ptq = 25 deg . find angle PSQ and OPQ
  41. geometry!!!! PLEASE HELP!!!!

    Outside of circle Γ, point A is chosen. Tangents AB and AC to Γ are drawn, with B,C on the circumference of Γ. On the extension of AB, D is a point such that B is between A and D, and ∠ADC=25∘. The circumcircle of ADC intersects Γ again at E
  42. geometry

    Outside of circle Γ, point A is chosen. Tangents AB and AC to Γ are drawn, with B,C on the circumference of Γ. On the extension of AB, D is a point such that B is between A and D, and ∠ADC=25∘. The circumcircle of ADC intersects Γ again at E
  43. trigonometry

    Use logarithms and the law of tangents to solve the triangle ABC, given that a=21.46 ft, b=46.28 ft, and C=32°28'30" I have to use logarithms and law of tangents . and then provide the check. which says law of sine or mollweids equation. I can't us the
  44. Mathematics

    XR and YQ are tangents to a circle YZXP.If angle ZXR=45 degree and angle YZX=55 degree,find angle ZYQ.
  45. MA

    a) find the equation of AB, the perpindicular bisector of the line joining the points P(-3,1) and Q(1,9) (line AB intersects the point at midway of PQ) b) C is the centre of a circle passing through P and Q. given that QC is parralel to the yaxis,
  46. maths

    a) find the equation of AB, the perpindicular bisector of the line joining the points P(-3,1) and Q(1,9) (line AB intersects the point at midway of PQ) b) C is the centre of a circle passing through P and Q. given that QC is parralel to the yaxis,
  47. 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
  48. Geometry

    pa and pb are tangents to circle from point p. chord ab is drawn. find the number of degrees contained in angle pab if angle apb contains a)80 degees b 40 degrees c) 60 degrees d) 90 degrees e) 120 degrees can some1 pllllz explain this 2 me!
  49. Calculus

    The differential equation dy/dx=(y-2)/(y+1) produces a slope field with horizontal tangents at y = 2 produces a slope field with vertical tangents at y = −1 produces a slope field with columns of parallel segments a) I only
  50. Math

    How many horizontal tangents does the graph of f(x)=(x-1)^2(x-3)^2 have? f(x)=(x-1)^2(x-3)^2 =2(x-1)(1)+2(x-3)(1) =2x-2+2x-6 f'(x)=4x-8 0=4x-8 =4(x-2) x=2 Therefore it only has 1 horizontal tangents?
  51. Language Arts

    Circle the correct form of the pronoun. 7. Both John and Jim said (he, they) were not exercising regularly. Circle they 8. The jury was asked to return to (its, their) seats. Circle their 9. Please remind each student to bring (his or her, their) homework
  52. 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
  53. 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
  54. Quantum Physics

    A particle of mass 2.00×10^−10 kg is confined in a hollow cubical three-dimensional box, each edge of which has a length, 2.00×10^−10 m, and for which the potential energy function is zero inside, and infinite outside, the box. The total energy of
  55. 8th grade math

    circle A has a raduis that is twice the length og the raduis of circle B. Which is an accurate statement about the relationship of these areas of circle A and B and y? a.the area of circle A is 4 times the area of circle B b. the area of circle A is twice
  56. Maths

    Question No. 10. The radii of two circles are 5 cms and 2 cms. The length of the direct common tangents to the circles is 1.5 times the length of the transverse common tangents. The distance between the centers of the circles in cms
  57. Chemistry

    Which three-centred π molecular orbitals are occupied in NO2-? Select all that apply.
  58. Pre-Calc (Circles)

    Describe the conditions necessary, where circle A has a larger radius than circle B, for the two circle to have no points of intersection, while circle B is entirely in the interior of circle A.
  59. Language Arts

    Read each sentence. Circle the contraction or contractions in each sentence below: 1. He's going to show me how to prepare dinner. Answer: Circle He's 2. Can you tell if she's your friend or enemy? Answer: Circle she's 3.We'll have to empty out our garage
  60. Calculus

    If t is a constant and the curve y=2x^3+3tx^2+6x+131 has NO horizontal tangents, what conditions must t satisfy? (a) t >-2 (b) t < 2 (c) t > 2 (d) t < -2 (e) none of these Apparently, the correct answer is (e). So for the curve to have no horizontal
  61. Language Arts

    Circle the correct form of the pronoun 1. Jane and Sarah said (she, they) were too tired to skate any longer. Circle they 2. Either Bill or John will bring a sample of (his, their) own work. Circle their 3. Jane and Jill called (her, their) friend. Circle
  62. vn college

    sodium has a body centred packing.If a distance between two nearest atom is 3.7A¡ã,then lattice parameter is ?
  63. Calculus

    The differential equation dy/dx = (y-2)/(y-1) I.produces a slope field with horizontal tangents at y = 2 II.produces a slope field with vertical tangents at y = -1 III.produces a slope field with columns of parallel segments A. I only B. II only C. I and
  64. Calculus

    The differential equation dy/dx=(x+1)/(x-2) I. produces a slope field with horizontal tangents at x = −1 II. produces a slope field with vertical tangents at x = 2 III.produces a slope field with rows of parallel segments a) I and II only b) II only c)
  65. 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
  66. 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
  67. 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
  68. Chemistry

    Culd i get a reference to the formulae used in Solid State ?? (Like the no.of atoms in a face centred cubic cell is 4 Etc )
  69. algebra

    one medium circle and one small circle touche echother and each of tese circles touches the big circle caculatete the shaded regen use 3.14 in it the medum circle is 10 and the small circle is 4
  70. 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
  71. physics

    A block of mass m = 4.30 kg is released from rest from point circle a and slides on the frictionless track shown in the figure below. (Assume ha = 5.20 m.) B=3.20 c=2.00 (a) Determine the block's speed at points circle b and circle c. point circle b Y
  72. Language Arts

    Directions: Circle the correct form of negative to complete each sentence. 1. I decided that there wasn't (no, any) point in finishing the project. Answer: Circle any 2. I could name (none, any) of the singers we heard. Answer: Circle any 3. The woman left
  73. 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?
  74. Pre-Calc

    Describe the conditions necessary for the two circles, where circle a has a larger radius than circle b, to have no points of intersection, while each circle is entirely in the exterior of the other circle.
  75. 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.
  76. 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
  77. college. physics and chemistry and mathematics

    An element crystalline in face centred cubic lattice. CCalculate the length of the side of the unit cell if the radius of atom is200pm
  78. geometry

    m
  79. Maths

    In our math class, we didn't really go through alot on The circle so I still have some problem about the question assigned to me : Two circle C1 and C2 have equations x^2 + y^2 +4x - 3 = 0 and 2x^2 + 2y^2 +4x -6y + 3 =0 respectively. Show that, for all
  80. 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
  81. 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
  82. Math

    Circle O is centered at the origin and has a radius of 5. Circle O' is the image of circle O after a translation of T1,2. What is the center of circle O'? What is the radius of circle O'?
  83. AP Calculus Help Five Questions

    1. Find the particular solution to y " = 2sin(x) given the general solution y = -2sin(x) + Ax + B and the initial conditions y(pi/2) = 0 and y'(pi/2) = -2. 2. What function is a solution to the differential equation y ' - y = 0? 3. If dy/dx = cos^2(pi*y/4)
  84. maths

    please help im quite stuck with this question a boat sails in a straight line, its position at time t is (-t+600,2t-300). a man stands on a small island, at position (200,100). due to fog, he can see objects of radius 200m centred at his position. a) find
  85. Mathematics

    The center of a circle is (−2,3) and a point on the circumference is (−5,−1) (i) Find the equation of the line joining the two points (ii) Show that the radius of the circle is 5 units (iii) Write down the equation of the circle (iv) Determine the
  86. math...2 word problems

    Two questions: (1) In a class every boy is friends with exactly 3 girls. Every girl is friends with exactly 2 boys. There are only 19 desks (each holding at most two students), and 31 of the students in the class study French. How many students are there?
  87. physics

    A roller-coaster car of mass 1.80 103 kg is initially at the top of a rise at point circle a. It then moves 40.8 m at an angle of 50.0° below the horizontal to a lower point circle b. (a) Find both the potential energy of the system when the car is at
  88. Geomatric series

    A fractal is created: A circle is drawn with radius 8 cm. Another circle is drawn with half the radius of the previous circle. The new circle is tangent to the previous circle. Suppose this pattern continues through five steps. What is the sum of the areas
  89. 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
  90. 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
  91. math

    find the area of each circle. round to the nearest tenth.use 3.14or 22/7. 1.circle with 6cm 2.circle with 25in 3.circle with 11ft 4.diameter =10.5 5.radius=6.3mm 6.radius=31/4 yd
  92. MATH HELP PLEASE

    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
  93. math

    I am supposed to find the area of a segment of a circle. The circle is cut with two radi with an angle of 90 degrees. Then where the radi touch the circle another line is drawn to connect them. The triangle and the small section between the triangle and
  94. math

    I am supposed to find the area of a segment of a circle. The circle is cut with two radi with an angle of 90 degrees. Then where the radi touch the circle another line is drawn to connect them. The triangle and the small section between the triangle and
  95. geometry

    what the angle between the tangents at T?
  96. math

    Two chords in a circle are equal in lengh.The distances from the centre of the circle can be represented by x2 and 4x respectively.How far is it chord from the centre of the circle?[Under the topic of properties of a circle.]
  97. math

    Brilli the ant placed the numbers 1,2,…,n in order clockwise around a circle. She can create an infinite sequence A={aj}∞j=0 of integers by letting a0=k∈{1,2,…,n} and constructing ai+1 from ai by taking the integer that is ai positions clockwise in
  98. Math (help steve)

    Brilli the ant placed the numbers 1,2,…,n in order clockwise around a circle. She can create an infinite sequence A={aj}∞j=0 of integers by letting a0=k∈{1,2,…,n} and constructing ai+1 from ai by taking the integer that is ai positions clockwise in
  99. geometry

    In the diagram, circle A is tangent to circle C, and segment BE is tangent to circle A. The radius of circle A is 11 meters and the radius of circle C is 8 meters. Find the area of triangle ABE to the nearest square meter.
  100. 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

Pages

  1. 1
  2. 2
  3. 3
  4. 4
  5. 5
  6. 6
  7. 7
  8. 8
  9. 9
  10. 10
  11. 11
  12. 12
  13. 13
  14. 14
  15. 15
  16. 16
  17. 17
  18. 18
  19. 19
  20. 20