keliling = πd
314 = 3,14 × d
314 = 3,14d
314/3,14 = d
100 = d
diameter = 100 dm
jari-jari (r) = 100 : 2 = 50 dm
luas
luas = πr²
luas = 3,14 × (50 dm)²
luas = 3,14 × 2500 dm²
luas = 7850 dm²
Penjelasan dengan langkah-langkah:
keliling= 2 x π x r
r= keliling : (2 x π)= 314 : (2 x 3,14)= 50
diameter= 2 x r= 2 x 50= 100 dm
luas= π x r²= 3,14 x 50²= 3,14 x 2500= 7.850 dm²
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keliling = πd
314 = 3,14 × d
314 = 3,14d
314/3,14 = d
100 = d
diameter = 100 dm
jari-jari (r) = 100 : 2 = 50 dm
luas
luas = πr²
luas = 3,14 × (50 dm)²
luas = 3,14 × 2500 dm²
luas = 7850 dm²
Penjelasan dengan langkah-langkah:
keliling= 2 x π x r
r= keliling : (2 x π)= 314 : (2 x 3,14)= 50
diameter= 2 x r= 2 x 50= 100 dm
luas= π x r²= 3,14 x 50²= 3,14 x 2500= 7.850 dm²