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A,B,C and D are 4 points on the circumfe...

A,B,C and D are 4 points on the circumference of the circle and O is the centre of circle `angle OBD - angle CBD = angle BDC - angle ODB` find `angle A `

A

`45^@`

B

`60^@`

C

`120^@`

D

`135^@`

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The correct Answer is:
B
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LUCENT PUBLICATION-CIRCLE AND ITS TANGENT LINES-EXERCISE 8A
  1. If the length of the three sides of a triangle are 6 cm, 8 cm and 10 c...

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  2. In the figure given below, what is the measure of angle CBA?

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  3. A,B,C and D are 4 points on the circumference of the circle and O is...

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  4. PQ is a common chord of two circles. APB is a secant line joining poin...

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  5. ABCD is a cyclic quadrilateral. The tangent at A and C meet at a point...

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  6. In the figure XY is a tangent to the circle with centre O at A. If ang...

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  7. In the figure given above, AP = 3 cm, PB = 5 cm, AQ = 2 cm and QC = x....

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  8. In the figure given above, PT is a tangent to a circle of radius 6 cm....

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  9. A point P moves such that its distances from two given points A and B...

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  10. In the given figure O is the centre of the circle. Line UTV is tangent...

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  11. In the figure, angle AOB = 46^(@), AC and OB intersect at right angle ...

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  12. In the figure given above, O is the centre of the circle and angle AOD...

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  13. What is the number of circles passing through a given pair of points ?

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  14. In the given figure, AB is a diameter of a circle and CD is perpendicu...

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  15. The edges of the diameter of circles are A & B whose centre is P. A po...

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  16. ABCD is quadrilateral whose sides touch a given circle. Which of the f...

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  17. Let PAB be a secant to a circle intersecting at points A and B, and PC...

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  18. In the figure below, if angle BAD = 60^(@), angle ADC = 105^(@), then ...

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  19. In the figure given above, PQ is a diameter of the circle whose centre...

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  20. In the given figure O is the centre of the circle AC and BD intersects...

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