Answer:
Surface area = 528 cm²
Step-by-step explanation:
The net of the prism is composed of 2 equal triangles and 3 rectangles (only 2 are of the same dimensions)
Area of the 2 triangles:
Area of the 2 triangles = 2(½*bh)
= 2(½*6*8)
= 6*8
= 48 cm²
Area of the 2 equal rectangles:
Area = 2(L*W)
L = 20
W = 9
Area of the 2 equal rectangles = 2(20*9)
= 360 cm²
Area of the 3rd rectangle:
Area = L*W
L = 20
W = 6
Area = 20*6 = 120 cm²
✔️Surface area of prism = 48 + 360 + 120 = 528 cm²
