K =88 cm
r=K /2π
=88 : 2 x 22/7
=88 : 44/7
=88 x7/44
=14 cm
L =πr²
=22/7 x 14 x 14
=44 x 14
=616 cm²
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K =88 cm
r=K /2π
=88 : 2 x 22/7
=88 : 44/7
=88 x7/44
=14 cm
L =πr²
=22/7 x 14 x 14
=44 x 14
=616 cm²
88 = 2.22/7.r
r = 88 x 7 / 44
= 14 cm
luas = πr^2
= 22/7 . 14.14
= 616 cm^2