Tentukan keliling lingkaran

~lingkaran

_________

Penjelasan dengan langkah-langkah:

1. r = 14 cm

K = 2.π.r

= 2 × 22/7 × 14

= 2 × 22 × 2

= 88 cm

2. r = 35 cm

K = 2.π.r

= 2 × 22/7 × 35

= 2 × 22 × 5

= 220 Cm

3. r = 30 cm

K = 2.π.r

= 2 × 3,14 × 30

= 188,4 cm

4. d = 49 cm

K = π × d

K = 22/7 × 49

K = 22 × 7

K = 154 cm

5. d = 84

K = π × d

K = 22/7 × 84

K = 22 × 12

K = 264 cm