Question

Calcule a area hachurada ??

Answer 1

Explicação passo-a-passo:

a)

S = π x (R² - r²)

S = π x (8² - 5²)

S = π x (64 - 25)

S = 39π cm²

b)

S = π x (R² - r²)

S = π x (9² - 4²)

S = π x (81 - 16)

S = 65π cm²

c)

S = π x (R² - r²)

S = π x (10² - 4²)

S = π x (100 - 16)

S = 84π cm²

d)

S = π x (R² - r²)

S = π x (4² - 2²)

S = π x (16 - 4)

S = 12π cm²