yg pintar MTK tolong bantu dong jgn asal²lan pliss dong besok dikumpulkan

[tex]4. \: a. \: \frac{60}{360} \times \frac{22}{7} \times 7 \times 7 \\ \frac{1}{6} \times 22 \times 7 \\ 25.6666 \\ b. \: \frac{150}{360} \times \frac{22}{7} \times 7 \times 7 \\ \frac{5}{12} \times 22 \times 7 \\ \frac{5}{6} \times 11 \times 7 \\ \frac{5}{6} \times 77 \\ 36.1444[/tex]