Hitunglah panjang jari jari lingakran jika keliling nya A= 110cm phi 22/7 B= 62,8cm phi 3,14

Rumus keliling lingkaran = 2 x phi x r

Hitung jari” nya jika :
1. K = 110 cm, phi = 22/7
K = 2 x phi x r
110 = 2 x 22/7 x r
110 = 44/7 r
r = 110 x 7/44
= 17,5 cm

2. K = 62,8 cm, phi = 3,14
K = 2 x phi x r
62,8 = 2 x 3,14 x r
62,8 = 6,28 r
r = 62,8/6,28
= 10 cm

Semoga membantu:)