In order to find the total area, we'll find the area of the base, of the two triangles and the two rectangles on the top.
Base:
A1 = 12.5*8
A1= 100 cm²
Triangles:
A2 = (8*3)/2 *2
A2 = 24 cm²
Rectangles on the top:
A3 = 12.5*5 *2
A3 = 125 cm²
Total area = A1+A2+A3
TA = 100+24+25
TA = 149 cm²
Answer: 149 cm²