hitunglah panjang jari jari lingkaran yg memiliki keliling 154 cm gunakan nilai phi

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Mapel : Matematika
Tentang : Bangun Datar
Pertanyaan yg diajukan : 1
Pembahasan :

Diketahui :
- Keliling (K) : 154 cm

Ditanya :
- Jari - jari (r)

K = π x d
154 = 22/7 x d
d = 154/22/7
d = 154 x 7/22
d = 7 x 7
d = 49 cm

r = 49/2
r = 24,5 cm

Jawaban : 24,5 cm

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