tolong ya kak bantu, makasih ^-^

24.
keliling lingkaran =
[tex]2 \times \pi \times r[/tex]
diket : r = 10cm
1/4 lingkaran

JAWAB:
[tex]k = \frac{1}{4} (2 \times \pi \times r) \\ k = \frac{1}{4} (2 \times 3.14 \times 10) \\ k = \frac{1}{4} (62.8) \\ k = 15.7cm[/tex]
25. diket : luas = 113,04
ditanya: jari jari

jawab:
[tex]l = \pi \times {r}^{2} \\ 113.04 = 3.14 {r}^{2} \\ \\ \frac{113.04}{3.14} = {r}^{2} \\ 36 = {r}^{2} \\ \sqrt{36} = r \\ 6 = r[/tex]
jadi jari jari nya 6cm