tolong jawabin soal ini

Jawabannya:
[tex]\frac{\ \textless \ AOB}{SudutSatuPutaranPenuh} = \frac{Luas Juring AOB}{Luas Lingkaran} \\ \frac{75^{o}}{360^{o}} = \frac{Luas Juring AOB}{ \pi \times r \times r} \\ \frac{5}{24} = \frac{Luas Juring AOB}{ \frac{22}{7} \times 21 cm \times 21 cm} \\ \frac{5}{24} = \frac{Luas Juring AOB}{ 1386 cm^{2} } \\ 5 \times 1386 cm^{2} = 24 \times Luas Juring AOB \\ \frac{5 \times 1386cm^{2} }{24} = Luas Juring AOB \\ \frac{6930cm^{2} }{24} = Luas Juring AOB \\ 288,75 cm^{2} = Luas Juring AOB \\[/tex]