tolong jawab ya ketiga, keempat, Dan kelima pakai cara ya

panjang busur= sudut/360 *2*π*r

ketiga:
[tex]88 = \frac{120}{360} \times 2 \times \frac{22}{7} \times r \\ r = \frac{88 \times 360 \times 7}{120 \times 2 \times 22} \\r = 42 \: cm[/tex]
keempat:
[tex]31.4 = \frac{x}{360} \times 2 \times 3.14 \times 100 \\ x = \frac{31.4 \times 360}{2 \times 3.14 \times 100} \\ x = 18[/tex]
kelima:
[tex]1256 = \frac{72}{360} \times 2 \times 3.14 \times r \\ r = \frac{1256 \times 360}{2 \times 3.14 \times 72} = 1000 \: cm[/tex]