= 2πr
= 2 × 22/7 × 42 cm
= 1.848/7 cm
= 264 cm
@BeruangGemoy :•
diameter = 1/2 x r/jari jari
jari jari = 2 x D
π/Pi= 22/7 atau 3,14 ( 22/7 di pakai jika ada kelipatan 7)
mencari keliling lingkaran ada 2 cara yaitu :
1. K = 2 × π × r
= 2 × 22/7 × 42
2. K = π × d
= 22/7 × 84
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= 2πr
= 2 × 22/7 × 42 cm
= 1.848/7 cm
= 264 cm
@BeruangGemoy :•
diameter = 1/2 x r/jari jari
jari jari = 2 x D
π/Pi= 22/7 atau 3,14 ( 22/7 di pakai jika ada kelipatan 7)
mencari keliling lingkaran ada 2 cara yaitu :
1. K = 2 × π × r
= 2 × 22/7 × 42
= 264 cm
2. K = π × d
= 22/7 × 84
= 264 cm