Jawaban:
Mencari diameter lingkaran
Keliling lingkaran = π x d
94,2 = 3,14 x d
d = 94,2 : 3,14
d = 30 cm
Mencari jari-jari lingkaran
Keliling lingkaran = 2 x π x r
94,2 = 2 x 3,14 x r
94,2 = 6,28 x r
r = 94,2 : 6,28
r = 15 cm
Atau
r =
r = d : 2
= 30 : 2
= 15 cm
Mencari luas lingkaran
Luas = π x r²
= 3,14 x 15 x 15
= 706,5 cm²
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Jawaban:
Mencari diameter lingkaran
Keliling lingkaran = π x d
94,2 = 3,14 x d
d = 94,2 : 3,14
d = 30 cm
Mencari jari-jari lingkaran
Keliling lingkaran = 2 x π x r
94,2 = 2 x 3,14 x r
94,2 = 6,28 x r
r = 94,2 : 6,28
r = 15 cm
Atau
r =
r = d : 2
= 30 : 2
= 15 cm
Mencari luas lingkaran
Luas = π x r²
= 3,14 x 15 x 15
= 706,5 cm²
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