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In the figure given alongside ,AB and CD...

In the figure given alongside ,AB and CD are straight lines thorugh the centre O of a circle. If ` angle AOC = 80 ^(@) and angle CDE= 40 ^(@) ` , find ` angle DCE`

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The correct Answer is:
`50 ^(@)`
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ICSE-CIRCLES-EXERCISE 17(A)
  1. In the following figure. O is the centre of the circle . angle AOB ...

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

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

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

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

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

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

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

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

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

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

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  12. In the given figure ,RS is a diameter of the circle NM is parallel to...

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  13. In the figure , given alongside. AB //CD and O is the centre of the ci...

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  14. Two circles intersects at P and Q. through P, a straight line APB is...

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  15. ABCD is a cyclic quadrilateral in which AB and DC on being produced , ...

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  16. AB is a diameter of the circle APBR at shown in the figure. APQ and ...

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  17. In the given figure . SP is bisector of angle RPT and PQRS is a cyc...

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  18. In the figure O is the centre of the circle angle AOE = 150 ^(@) , an...

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  19. In the figure , given below P and Q are the centres of two circles i...

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  20. The figure shows two circles which intersects at A and B . The centre ...

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