Jawabanmu

2014-05-28T15:50:54+07:00
K= 2 x pi x r
r= 44/2 pi
r=22/pi
L= pi x r2
=pi (22/pi)2
=484/pi
484/3.14=154,14
pi nya diganti jadi 3,14
2014-05-28T23:07:37+07:00
Keliling lingkaran = pi.d
K O = 22/7 × diameter
44 = 22/7 d
d = 44 × 7/22
d = 14 cm
r = 7 cm

luas lingkaran = pi.r^2
luas lingkaran = 22/7 . 7 . 7
luas = 154 cm2