In Delta ABC if (a+b+c) ( a-b+c)= 3ac,...

In `Delta` ABC if (a+b+c) ( a-b+c)= 3ac, Then find `angle B`

A

`angleB=60^@`

B

`angleB=30^@`

C

`angleC=60^@`

D

`angleA+angleC=90^@`

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The correct Answer is:

A

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