Answer:
482.84u², 42.5cm², 51.5ft²
Explanation:
1) A = 2(1 + √2)a²
A = 2(1 + √2)(80 / 8)²
A = 482.84units²
2) Square = 5²
Square = 25
T1 = 3 x 5 / 2
T1 = 7.5
T2 = 4 x 5 / 2
T2 = 10
Total = 10 + 7.5 + 25
Total = 42.5cm²
3) Rect = 4(8 + 3)
Rect = 44
T1 = 2 x 3 / 2
T1 = 3
T2 = 3 x 3 / 2
T2 = 4.5
Total = 3 + 4.5 + 44
Total = 51.5ft²