hitunglah keliling lingkaran jika A. r=2cm B. r=3cm C. r=40cm D. r=0,6cm

Penyelesaian :

Keliling lingkaran = phi×d
Diameter = r×2

A. Keliling
= 3,14 × 4
= 12,56cm
B. Keliling
= 3,14 × 9
= 28,26cm
C. Keliling
= 3,14 × 80
= 251,2cm
D. Keliling
= 3,14 × 1,2
= 3,768cm

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semoga membantu teman-teman.....