Question

Please help thank you.

Answer 1

You have a rectangle and 2 triangles:
 rectangle =  12 *6 = 72

larger triangle on left, find the base: 
base = 6 / tan(45) = 6

area = 1/2 x b x h = 1/2 x 6 x 6 = 18

smaller triangle:
 area = 1/2 x b x h
1/2 x 2 x 6 = 6
 

total area:
  72 +6 +18 = 96 cm^2