Posted by **PLEASE...HELP..ANYONE** on Wednesday, March 13, 2013 at 1:18am.

Γ is a circle with center O. A and B are points on Γ such that the sector AOB has a perimeter of 40. Amongst all circular sectors with a perimeter of 40, what is the central measure of ∠AOB (in radians) of the sector with the largest area?

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