Jawaban:
* Jika 20 cm nya jari-jari
K = 1/2 (2xπxr)
= 1/2 (2x3,14x20)
= 2x3,14x10
= 62,8 cm
* Jika 20 cm nya diameter
K = 1/2 (πxd)
= 1/2 (3,14x20)
= 3,14x10
= 31,4 cm
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Jawaban:
* Jika 20 cm nya jari-jari
K = 1/2 (2xπxr)
= 1/2 (2x3,14x20)
= 2x3,14x10
= 62,8 cm
* Jika 20 cm nya diameter
K = 1/2 (πxd)
= 1/2 (3,14x20)
= 3,14x10
= 31,4 cm