△ABC is a right isosceles triangle, the centers of two arcs are the midpoint of

AB

and point C. Find the difference of the area of the "moon" and the triangle, if the length of hypotenuse is 12in.

*let m∠cob = 50°30’, m∠aob = 70° and m∠aoc = 20°30’. could point c be in the interior of ∠aob? why? a. point c could be the interior of aob but it is not the only case b. point c is the interior of aob c. point c is not the interior of aob d. the given is not possible for the plane geometry answer