Carilah keliling bangun datar diatas!
- k = 1/4 × 2 × π × r
- K = 1/4 × 2 × 3,14 × 50
- k = 1/4 × 6,28 × 50
- k = 1/4 × 314
- k = 314/4
- k = 78,5 cm
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↘️Jawab↙️
Diketahui:
- Jari-jari lingkaran 50 cm
Ditanyakan:
- Keliling?
⬇️Cara⬇️
K¼ = ¼ × ( 2. π. r ) + 2 × r
= ( ¼ × 2. 3,14. 50 ) + 2 × 50
= 78,5 + 100
= 178,5 <= Jawaban
Jadi, Keliling lingkaran tersebut adalah 178,5 cm
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