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#Lingkaran
Diketahui diameter lingkaran 14 cm, maka jari-jari 7 cm
Luas = 22/7 x r x r = 22/7 x 7 x 7 = 154 cm²
Keliling = 2 x 22/7 x r = 2 x 22/7 x 7 = 44 cm