Jawabanmu

2014-02-12T21:07:50+07:00
D = 100
K = 314
L = 7,850
caranya
a) d = 2 x r
= 2 x 50 = 100
b) K = 2πr
= 2 x 3,14 x 50
= 314
c) L = πr2
= 3,14 x 50 x 50
= 7850
Luasnya bukan 7,850 tapi 7850
terima kasih
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