Bantu Jawab Kaka....pleaseeee

Bantu Jawab Kaka….pleaseeee

$1. : keliling = pi times d \ 198 = frac{22}{7} times d \ d = 198 times frac{7}{22}$

$d = 63 : cm \ r = 63 div 2 = 31.5 : cm$

$2. : keliling = pi times d \ kelling = 3.14 times 50 \ keliling = 157 : cm$

$3. : keliling : = pi times d \ 132 = frac{22}{7} times d \ d = 132 times frac{7}{22}$

$d = 42 : cm \ r = 42 div 2 = 21 : cm$

$luas = pi times r {}^{2} \ luas = frac{22}{7} times 21 {}^{2} \ luas = 1386cm {}^{2}$

$4. : d = 1.4m : : : : r = 1.4 div 2 = 0.7m = 70cm$

$luas = pi times r {}^{2} \ luas = frac{22}{7} times 70 {}^{2} = 154 : cm {}^{2}$

$5. : luas = pi times r {}^{2} \ 12474 = frac{22}{7} times r {}^{2} \ r {}^{2} = 12474 times frac{7}{22} = 3969 \ r = sqrt{3969} = 63cm$

Maaf jika salah

semoga membantuuu

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