R=… d=42cm. k=… L=… pake cara​

By Posted on

R=… d=42cm. k=… L=… pake cara​

Jawaban:

r=21cm

d=42cm

k=132cm

L=1386cm²

Penjelasan dengan langkah-langkah:

r = frac{d}{2} = frac{42}{2} = 21cm \ k = pi times d = frac{22}{7} times 42 = 22 times 6 = 132cm \ luas = pi times {r}^{2} = frac{22}{7} times {21}^{2} = frac{22}{7} times 441 = 22 times 63 = 1386 {cm}^{2}