tolong jawab semua pakai jalan tolong yaa

11. [tex]= 300( \pi . d) \\ = 300( \frac{22}{7} . 49) \\ = 300(22 . 7) \\ = 300 . 154 \\ = 46200 cm \\ = 462 m(C) \\ 12. \frac{\ \textless \ AOB}{\ \textless \ BOC} = \frac{ L_{juring AOB} }{ L_{juring BOC} } \\ = \frac{60}{120} = \frac{L_{juring AOB}}{304,44} \\ = \frac{1}{2} = \frac{L_{juring AOB}}{304,44} \\ = 304,44 = 2AOB \\[/tex][tex]152,22 (C)[/tex][tex]13. L_{ODE} = \frac{108}{360} . L_{lingkaran} \\ = 211,95 = \frac{108}{360} . \pi . r. r \\ = 211,95 = 0,3 X 3,14 r^{2} \\ = 211,95 = 0,942r^{2} \\ = \frac{211,95}{0,942} = r^{2} \\ = r^{2} = 225 \\ = r = \sqrt{225} \\ = r = 15 (A)[/tex][tex]14. x = n( \pi . d) \\ = 17600 = n( \frac{22}{7} . 56) \\ = 17600 = n(176) \\ = 17600 = 176n = \frac{17600}{176} = n = n = 100 (A) [/tex] [tex]15. L_{lingkaran} = \pi . r . r \\ = 3,14 . 30 . 30 \\ = 2826 \\ L_{persegi} = s^{2} \\ = 30 . 30 \\ = 900 \\ 2826 - 900 = 1926 (C)[/tex][tex]17. \ \textless \ L = 90' \\ \ \textless \ K = 52' \\ 180 = \ \textless \ L + \ \textless \ K +\ \textless \ M 180 = 52 + 90 + \ \textless \ M \ \textless \ M = 38(A)[/tex]