Question

Luas sebuah lingkaran 314cm² hitung keliling lingkaran

Answer 1

L = phi * r * r
314 = 3,14 * r * r
r² = √100
r = 10 cm

K = 2 * phi * r
K = 2 * 3,14 * 10
K = 62,8 cm

Semoga Membantu

Answer 2

L = 3,14 x r^2
314 = 3,14 x r^2
100 = r^2
10 = r
20 = d

K= 3,14 x d
= 3,14 x 20
=62,8 cm