Question

A parallelogram has sides A, B, C, and D. Sides A and B have a length of `9` and sides C and D have a length of `7`. If the angle between sides A and C is `(5 pi)/8`, what is the area of the parallelogram?

Answer 1

The area is

#E=absA*absC*sin(A,C)=>E=9*7*sin(5*pi/8)=>E=9*7*(0.92)=> E=58.2cm^2#