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DeltaABC में, angleB=60^(@),angleC=40^(...

`DeltaABC` में, `angleB=60^(@),angleC=40^(@)` | यदि `AD,angleBAC` को समद्विभाजित करती है और `AEbotBC` , तो `angleEAD` है

A

`10^(@)`

B

`20^(@)`

C

`40^(@)`

D

`80^(@)`

लिखित उत्तर

Verified by Experts

The correct Answer is:
A

`angleB=60^(@):angleC=40^(@)angleA`
`=180-100=80^(@)`
`angleBAD=angleDAC=40^(@)`
`thereforeangleABE` से,
`angleBAE=180^(@)-60^(@)-90^(@)=30^(@)`
`angleEAD=40-30=10^(@)`
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