Quadrilaterals and Polygons
Hexagon ABCDEF is inscribed in a circle. The sides AB, CD and EF are each x units in length whereas the sides BC, DE and FA are y units in length. Then the radius of the circle is ?
In the rectangle ABCD, the perpendicular bisector of AC divides the longer side AB in a ratio 2:1. Then the angle between AC and BD is .