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If bisectors of angleA and angleB of a q...

If bisectors of `angleA` and `angleB` of a quadrilateral ABCD meet at O, then `angleAOB` is

A

`angleC + angleD`

B

`1/2 (angleC + angleD)`

C

`1/2 angleC + 1/3 angleD`

D

`1/3angleC + 1/2 angleD`

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The correct Answer is:
B
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SURA PUBLICATION-GEOMETRY -EXERCISE 4.7
  1. The exterior angle of a triangle is equal to the sum of two

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  2. In the quadrilateral ABCD, AB=BC and AD=DC Measure of angleBCD is . . ...

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  3. ABCD is a square, diagonals AC and BD meet at O. The number of pairs o...

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  4. In the given figure CE || DB then value of x^(@) is . . . . . . . . .

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  5. If the diagonal of a rhombus are equal, then the rhombus is a

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  6. If bisectors of angleA and angleB of a quadrilateral ABCD meet at O, t...

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  7. The interior angle made by the side in a parallelogram is 90^(@) then ...

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  8. Which of the following statement is correct?

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  9. The angles of the triangles are 3x-40, x+20 and 2x-10 then the value o...

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  10. PQ and RS are two equal chords of a circle with centre O such that ang...

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  11. A chord is at a distance of 15 cm from the center of the circle of rad...

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  12. In the figure, O is the centre of the circle and angleACB=40^(@) then ...

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  13. In a cyclic quadrilaterals ABCD, angleA = 4x, angleC = 2x the value of...

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  14. In the figure, O is the centre of a circle and diametre AB bisects the...

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  15. If one angle of a cyclic quadrilateral is 75^(@), then the opposite an...

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  16. In the figure, ABCD is a cyclic quadrilateral in which DC produced to ...

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  17. AD is a diameter of a circle and AB is a chord. If AD= 30 cm and AB = ...

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  18. In the given figure, If OP= 17 cm PQ= 30 cm and OS is perpendicular to...

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