hitunglah luas lingkaran dgn panjang jari-jari 3,5m dgn rumusnya

L =πr²
=22/7×3,5×3,5
=38,5

[tex]l = \pi {r}^{2} = \frac{22}{7} \times 3.5 \times 3.5 = \frac{22}{2} \times 3.5= 38,5