di ketahui sudut pusat aob adlah 30 dan jari jari 21 cm naka panjqng busur ab adalh

30/360.22/7.42
1/12.132
11

Jangan lupa like ya

< AOB = 30°
r = 21 cm

Panjang busur AB
= 30°/360° × 2 × phi × r
= 1/12 × 2 × 22/7 × 21
= 11 cm