Diket K=154 Tentukan lah r=? d=?

Kelas 4 Matematika
Bab Bangun Datar Sederhana

1] Keliling = 154
2 . π . r = 154
2 . 22/7 . r = 154
r = 154 . 7/44
r = 24,5

2] d = 2 x r
d = 2 x 24,5
d = 49

K = 154
K = π × d

■ d = 154 ÷ π
= 154 ÷ 22/7
= 154 × 7/22
= 49

■ r = d ÷ 2
= 49 ÷ 2
= 24,5