Penjelasan dengan langkah-langkah:
4. keliling = 2 x π x r
314 = 2 x 3,14 x r
314 / 2 = 3,14 x r
157 = 3,14 x r
157 / 3,14 = r
50 = r
luas = π x r x r
luas = 3,14 x 50 x 50
luas = 7850
5. luas = π x r x r
2464 = 22/7 x r²
2464 ÷ 22/7 = r²
784 = r²
√784 = r
28 = r
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Penjelasan dengan langkah-langkah:
4. keliling = 2 x π x r
314 = 2 x 3,14 x r
314 / 2 = 3,14 x r
157 = 3,14 x r
157 / 3,14 = r
50 = r
luas = π x r x r
luas = 3,14 x 50 x 50
luas = 7850
5. luas = π x r x r
2464 = 22/7 x r²
2464 ÷ 22/7 = r²
784 = r²
√784 = r
28 = r