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about to only mathematics

A

`(1)/(2)|z_(1)-z_(2)|^(2)`

B

`(1)/(2) |z_(1)-z_(2)|r`

C

`(1)/(2)|z_(1)-z_(2)|^(2) r^(2)`

D

`(1)/(2)|z_(1)-z_(2)|^(2)`

Text Solution

Verified by Experts

The correct Answer is:
B

By the given conditions, the are of the triangle ABC is given by `(1//2)|z_(1)-z_(2)|r.`
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