Hitunglah keliling berikut!! Dengan π ²²/⁷ a. D = 21cm b. R = 16cm c. D = 25cm
Jawab:
a. d = 21 cm
π =
K = π x d
= x 21
= 66 cm
b. r = 16 cm
π = 3,14
d = 2 x r = 2 x 16 = 32 cm
K = π x d
= 3,14 x 32
= 100,48 cm
c. d = 25 cm
π = 3,14
K = π x d
= 3,14 x 25
= 78,5 cm