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In the given figure O is the centre of t...

In the given figure O is the centre of the circle If ` angle AOB = 140 ^(@) and angle OAC = 50^(@) ` , find :
(i) ` angle ACB `
(ii) `angle OBC `
(iii) ` angle OAB `
(iv) ` angle CBA `

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The correct Answer is:
` 110 ^(@) (ii) 60 ^(@) (iii) 20 ^(@) (iv) 40^(@) `
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ICSE-CIRCLES-EXERCISE 17(A)
  1. In the figure , AB is common chord of the two circles. If AC and AD ar...

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  2. In the figure , given below. Find (i) angle BCD (ii) angle ADC...

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  3. In the given figure O is the centre of the circle If angle AOB = 140 ...

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  4. Calculate : (i) angle CDB (ii) angle ABC (iii) angle ACB

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  5. In the figure , given below .ABCD is a cyclic quadrilateral in which ...

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  6. In the following figure , O is centre of the circle and Delta ABC is ...

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  7. Given : angle CAB = 75 ^(@) and angle CBA = 50 ^(@) Find the va...

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  8. ABCD is a cyclic quadrilateral in a circle with centre O. If angle...

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  9. In the figure , given alongside , AOB is a diameter of the circle and ...

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  10. In the following figure. O is the centre of the circle . angle AOB ...

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  11. In cyclic quadrilateral ABCD , angle DAC = 27^(@) angle ADB = 33 ^...

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  12. In the figure given alongside ,AB and CD are straight lines thorugh th...

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  13. In the given figure AC is a diemeter of a circle O, A circle is descri...

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  14. In the following figure . (i) if angle BAD = 96^(@) , " find " ...

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  15. Prove that : the parallelogram , inscirbed in a circle , is a rect...

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  16. Prove that : the rhombus , inscribed in a circle is a square.

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  17. In the given figure AB = AC . Prove that DECB is an isoseles traqezium...

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  18. Two cirlces intersect at P and Q . Through P diameter PA and PB of th...

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  19. The figure given below, shows a circle with centre O. Given : angl...

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  20. Two chords AB and CD intersect at P inside the circle . Prove that the...

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