Question

Pake rumus dan cara ya

Answer 1

Rumus Lingkaran  L =

L = 1,54 dm^{2} = 1,54 x 100 = 154 cm

154 = 22/7 . r^{2}
154 x 7/22 = r^{2}
49 = r^{2}
r =
r = 7

d = 2r
=14 cm
 

Answer 2

L = π × r × r
1,54 dm² = 3,14 × r × r
r = 1,54 dm² : 3,14