एक त्रिभुज ABC में angleA+ 1/2 ang...

एक त्रिभुज ABC में `angleA+ 1/2 `angleB + `angleC= 140^(@)` तो `angleB` कितना होगा ?

A

`50^(2)`

B

`80^(@)`

C

`40^(@)`

D

`60^(@)`

लिखित उत्तर

Verified by Experts

The correct Answer is:

2

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