parallelogram has sides 60 m and 40 m and one of its diagonals is 80 m long then its area is:__________?
A. 480 sq.m
B. 320 sq.m
C. 600√15 sq.m
D. 450√15
parallelogram has sides 60 m and 40 m and one of its diagonals is 80 m long then its area is:__________?