1. In the following figure, two semicircles have been drawn, one on the side \(AB\) of the triangle, and the other on the side \(AC\) of the triangle (with centre \(O\)). What is the area of the blue region (lune) which is bounded by the two semicircles?
Isoscoles triangle A,B,C with base AC=4 and height 2. Semi-circular arcs are added from A to C and A to B                    respectively

Are there any shapes in this diagram whose areas we can find?