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In the given figure, BD = DC and / CBD =...

In the given figure, `BD = DC` and `/_ CBD = 30^(@)`, find `/_ BAC`.

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The correct Answer is:
`/_ BAC = 60^(@)`
`BD= DC implies /_ BCD = /_ CBD= 30^(@)`
` /_ BDC = 180^(@) - (30^(@) + 30^(@)) = 120^(@)`
`/_ BAC + /_ BDC = 180^(@) implies /_ BAC = 60^(@)`
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RS AGGARWAL-CIRCLES -EXERCISE 12C
  1. In the given figure, O is the centre of the circle and arc subtends an...

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  2. In the given figure , ABCD is a cyclic quadrilateral in which AE is dr...

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  3. In the given figure, BD = DC and / CBD = 30^(@), find / BAC.

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  4. In the given figure, O is the centre of the given circle and measure o...

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  5. In the given figure, , Delta ABC is equilateral . Find (i) / BDC , ...

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  6. In the adjoining figure, ABCD is a cyclic quadrilateral in which / BCD...

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  7. In the given figure, O is the centre of a circle and / BOD = 150^(@) ....

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  8. In the given figure , O is the centre of the circle and / DAB = 50^(@)...

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  9. In the given figure, sides AD and AB of cyclic quadrilateral ABCD are ...

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  10. In the given figure, AB is a diameter of a circle with centre O and DO...

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  11. Two chords AB and CD of a circle intersect each other at P outside the...

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  12. In the given figure, O is the centre of a circle. IF / AOD = 140^(@) a...

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  13. In the given figure, Delta ABC is an isosceles triangle in which AB = ...

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  14. In the given figure, AB and CD are two parallel chrods of a circle. If...

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  15. In the given figure, / BAD = 75^(@), / DCF = x^(@) and / DEF = y^(@) ....

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  16. In the given figure, ABCD is a quadrilateral in which AD= BC and / AD...

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  17. Prove that the perpendicular bisectors of the sides of a cyclic qua...

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  18. Prove that the circle drawn with any side of a rhombus as a diameter, ...

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  19. Prove that the centre of the circle circumscribing the cyclic recta...

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  20. Give a geometrical construction for finding the fourth point lyingon a...

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