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Let O be the centre of a circle and AC b...

Let O be the centre of a circle and AC be its diameter. BD is a chord intersecting AC at E. Point A is joined at B and D. If `angle BOC = 50^@` and `angle AOD= 110^@`, then `angle BEC`= ?
मान लीजिये कि O एक वृत्त का केंद्र है तथा AC इसका व्यास है |BD एक जीवा है जो AC को E पर काटती है | बिंदु A को B और D पर मिलाया जाता है | यदि `angle BOC = 50^@` और `angel AOD= 110^@` है , तो `angle BEC`= ?

A

`80^@`

B

`70^@`

C

`55^@`

D

`90^@`

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