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If in a triangle ABC, (s-a)(s-b)= s(s-c)...

If in a triangle `ABC, (s-a)(s-b)= s(s-c),` then angle `C` is equal to

A

`90^(@)`

B

`45^(@)`

C

`30^(@)`

D

`60^(@)`

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The correct Answer is:
A
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