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1 Jawaban
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1. Jawaban krstmon
Rumus keliling 2πr
a) d = 32 cm, r = 16 cm
Keliling = 2πr = 2. 3,14. 16 = 100,48 cm²
b) d = 38 cm, r = 19 cm
Keliling = 2πr = 2. 3,14. 19 = 119,32 cm²