<Dl> <Dd> m = 1 2 2 (b 2 + d 2) − 4 x 2 (\ displaystyle m = (\ tfrac (1) (2)) (\ sqrt (2 (b ^ (2) + d ^ (2)) - 4x ^ (2)))) </Dd> </Dl> <Dd> m = 1 2 2 (b 2 + d 2) − 4 x 2 (\ displaystyle m = (\ tfrac (1) (2)) (\ sqrt (2 (b ^ (2) + d ^ (2)) - 4x ^ (2)))) </Dd> <Dl> <Dd> n = 1 2 2 (a 2 + c 2) − 4 x 2 . (\ displaystyle n = (\ tfrac (1) (2)) (\ sqrt (2 (a ^ (2) + c ^ (2)) - 4x ^ (2))).) </Dd> </Dl> <Dd> n = 1 2 2 (a 2 + c 2) − 4 x 2 . (\ displaystyle n = (\ tfrac (1) (2)) (\ sqrt (2 (a ^ (2) + c ^ (2)) - 4x ^ (2))).) </Dd>

Types of angle triangle and quadrilateral and its properties