Jawabanmu

2014-05-11T14:14:00+07:00
Misal : jari jari = r
keliling = 88 cm
22/7 x 2r = 88 cm
2r           = 88 : 22/7
2r           = 88 x 7/22
2r           = 28
r             = 14 cm

luas = π x r²= 22/7 x 14² = 22/7 x 196 = 616 cm²
8 3 8
2014-05-11T14:14:32+07:00
K = 2 x 22/7 x r

88 = 2 x 22/7 x r

r = (88 x 7) / (22 x 4 )

r = 7 x 2

r = 14


L = 22/7 x r²

L = 22/7 x 14 x 14

L = 616 cm²
2 4 2