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π=3,14
Dit=luas lingkaran=?
Jawab:πr²
:3,14x20²
:1256
d : 40 : 1/2 : 40/2 : 20 R : 3,14
dit >
L....... ?
peny >
luas lingakran : Rr2
3,14 X 20 pangkat 2
3,14 X 20 X 20
3, 14 X 400
1256
jadi luas lingkaran 1256
maaf kalau salah