Answer:
12 cm
Answer = 452.39 cm²
8 m
Answer = A = 50.27 m²
9 dm
Answer = A = 254.47 dm²
Step-by-step explanation:
r = 12 cm
A = πr²
A = 3.14 (12 cm)²
A = 452.39 cm²
d = 8 m, r = d / 2 = 8 m / 2 = 4 m
A = πr²
A = 3.14 (4m)²
A = 50.27 m²
r = 9 dm
A = πr²
A = 3.14 (9 dm)²
A = 254.47 dm²
