Perhatikan gambar di samping.tolong bantuin

a. Panjang busur CD
[tex] = \frac{ {120}^{o} }{ {48}^{o} } \times 32cm \\ = 80cm[/tex]
b. Luas juring AOB
[tex] = \frac{ {48}^{o} }{ {120}^{o} } \times 45 {cm}^{2} \\ = 18 {cm}^{2} [/tex]