* r = √(s² - t²)
r = √(15² - 12²)
r = √(225 - 144)
r = √81 = 9 cm
L = π x r (r + s)
L = π x 9 (9 + 15)
L = 9π (24)
L = 216π cm²
e. L = πr (r + s)
* s = √(t² + r²)
s = √(15² + 8²)
s = √(225 + 64)
s = √289 = 17 dm
L = π x r (r + s)
L = π x 8 (8 + 17)
L = 8π (25)
L = 200π dm²
f. L = πr (r + s)
L = π x r (r + s)
L = π x 1 (1 + 2)
L = π (3)
L = 3π m²
g. L = 4πr²
L = 4π(12)²
L = 4π(144)
L = 576π cm²