Kel = π . d
62,8 = 3,14 . d
62,8 : 3,14 = d
20 = d
maka r = d : 2 = 10
L = 3,14 . 10 . 10
L = 314 cm2 = c
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Verified answer
K= 2.phi.r62,8=2x3,14xr
62,8=6,28xr
r=62,8:6,28
r=10
L=phi.r.r
=3,14x10x10
=314
jawaban 314,0cm (A)
Verified answer
Kel = π . d
62,8 = 3,14 . d
62,8 : 3,14 = d
20 = d
maka r = d : 2 = 10
L = 3,14 . 10 . 10
L = 314 cm2 = c