1.)
Luas lingkaran.
Luas = phi x r².
2.100 = 22/7 x r².
r² = 2.100 ÷ 22/7.
r² = 668,18.
r = 25,8.
Jadi jari jarinya adalah 25,8 cm.
8 = 2 x 4
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CARA JAWABAN
1.)
Luas lingkaran.
Luas = phi x r².
2.100 = 22/7 x r².
r² = 2.100 ÷ 22/7.
r² = 668,18.
r = 25,8.
Jadi jari jarinya adalah 25,8 cm.
8 = 2 x 4