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In a triangle O A B ,/A O B=90^0dot If P...

In a triangle `O A B ,/_A O B=90^0dot` If `P` and `Q` are points of trisection of `A B ,` prove that `O P^2+O Q^2=5/9A B^2`

A

`2/9AB^(2)`

B

`5/9AB^(2)`

C

`7/9AB^(2)`

D

`1/9AB^(2)`

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The correct Answer is:
B
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