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In an equilateral triangle ABC, the side...

In an equilateral triangle ABC, the side BC is trisected at D. Find the value of `AD^(2)` :

A

`9/7AB^2`

B

`7/9AB^2`

C

`3/4AB^2`

D

`(2sqrt(r_1r_2r_3))/(r_1+r_2+r_3-sqrt(r_1+r_2+r_3))`

Text Solution

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The correct Answer is:
B
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