kerjakan yang B hitung keliling dan luas nya dengan caranya. makasih

r1 = 14 cm
r2 = r3 = 7 cm
L = 1/2 x phi x r1 x r1 - 1/2 x phi x r2 x r2 + 1/2 x phi x r3 x r3

L = 1/2 x 22/7 x 14 x 14
L = 11 x 2 x 14
L = 22 x 14
L = 308 cm^2

K = 1/2 x 2 x phi x r1 + 1/2 x 2 x phi x r2 + 1/2 x 2 x phi x r3

K = phi x 14 + phi x 7 + phi x 7
K = phi x 14 + 2 x phi x 7
K = 22/7 x 14 + 2 x 22/7 x 7
K = 22 x 2 + 2 x 22
K = 44 + 44
K = 88 cm