Rumus keliling :
c = 2πr atau πd
Rumus jari :
r = d : 2
Rumus diameter :
d = 2 × r
1)
r = d × ½
= 11 × ½ = 5,5 cm
c = 3,14 × 11
= 34,54 cm
2)
d = 2 × 6
= 12 cm
c = 3,14 × 12
= 37,68 cm
3)
c = π×d
d = c : π
d = 50, 24 : 3,14
= 16 cm
r = 16 : 2
= 8 cm
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Jawaban:
1)
r = 5,5 cm
c = 34,54 cm
2)
d = 12 cm
c = 37,68 cm
3)
d = 16 cm
r = 8 cm
Penjelasan dengan langkah-langkah:
Rumus keliling :
c = 2πr atau πd
Rumus jari :
r = d : 2
Rumus diameter :
d = 2 × r
Cara :
1)
r = d × ½
= 11 × ½ = 5,5 cm
c = 3,14 × 11
= 34,54 cm
2)
d = 2 × 6
= 12 cm
c = 3,14 × 12
= 37,68 cm
3)
c = π×d
d = c : π
d = 50, 24 : 3,14
= 16 cm
r = 16 : 2
= 8 cm
Semoga membantu :)