For perimeter just add the sides up.
a) P = 57 + 41 + 57 + 41 = 196 in
Ignore the 36 because it is not an edge
b) P = 56 + 73 + 92 = 221 in
For areas look for measurements at right angles and multiply them.
a) A = 57 x 36 = 2052 in^2
b) A = 1/2 x 56 x 73 = 2044 in^2
The half is needed because all triangles are half the area of a rectangle.
