<Dl> <Dd> K = 1 4 ((p + q) 2 − 4 m 2) ⋅ (4 m 2 − (p − q) 2), (\ displaystyle K = (\ tfrac (1) (4)) (\ sqrt (((p + q) ^ (2) - 4m ^ (2)) \ cdot (4m ^ (2) - (p-q) ^ (2)))),) </Dd> </Dl> <Dd> K = 1 4 ((p + q) 2 − 4 m 2) ⋅ (4 m 2 − (p − q) 2), (\ displaystyle K = (\ tfrac (1) (4)) (\ sqrt (((p + q) ^ (2) - 4m ^ (2)) \ cdot (4m ^ (2) - (p-q) ^ (2)))),) </Dd> <P> if the lengths of two diagonals and one bimedian are given . </P> <P> The area of a quadrilateral ABCD can be calculated using vectors . Let vectors AC and BD form the diagonals from A to C and from B to D . The area of the quadrilateral is then </P>

What type of quadrilateral do the following vertices form