Untuk r = 3,14 hitunglah keliling tepi benda berikut
a. 21 cm
b. 24 cm
a. 21 cm
b. 24 cm
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= 2 (3,14) (21)
= 6,28 (21)
= 131,88
b. K = 2 (3,14) (24)
= 6,28 ( 24)
= 150,72
Soalnya bangun lingkaran kan?? Terus π = 3,14, yg 21 & 24 cm itu jari-jarinya..?!
Semoga membantu.
Maaf kalau salah.