Let OX1,OX2 be rays in the interior of a convex angle XOY such that ∠XOX1=∠YOY1<31∠XOY. Points K on OX1 and L on OY1 are fixed so that OK=OL, and points A, B are vary on rays (OX,(OY respectively such that the area of the pentagon OAKLB remains constant. Prove that the circumcircle of the triangle OAB passes from a fixed point, other than O. geometrycircumcirclegeometry proposed