luas lingkaran=3850 cm2 Jari-jari=........ Diameter=....... tolong dijawab dan diberi caranya... terimakasih

L = π × r²
3850 = 22/7 × r²
r² = 3850 × 7/22
r² = 1225
r = √ 1225 = 35 cm
d = 2 × r = 2 × 35 = 70 cm

Luas Lingkaran = Πr²
3.850 = 22/7 x r²
3.850 x 7 = 22 x r²
26.950 = 22 x r²
26.950 ÷ 22 = r²
1.225 = r²
√1.225 = r
r = 35 cm
d = 2r
d = 70 cm

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