Question

Tentukn keliling dan luas lingakaran berikut
A. r = 9 cm
B = 4 cm
C = 10 cm

Answer 1

K = phi x 2 x r
L = phi x r²

a. r = 9
k = 3,14 x 2 x 9 = 56,52
l = 3,14 x 9 x 9 = 254,34

b. r = 4
k = 3,14 x 2 x 4 = 25,12
l = 3,14 x 4 x 4 = 50,24

c. r = 10
k = 3,14 x 10 x 2 = 62,8
l = 3,14 x 10 x 10 = 314