tentukan keliling lingkaran r=10,5 cm

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

Diketahui :
- Jari - jari (r) : 10,5 cm

Ditanya :
- Keliling (K)

K = 2 x π x r
K = 2 x 22/7 x 10,5
K = 2 x 22 x 1,5
K = 2 x 33
K = 66 cm

Jawaban : 66 cm

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