luas bangun di samping adalah...cm pake cara

L = 1/2 × phi × r^2
= 1/2 × 3,14 × 10^2
= 1/2 × 3,14 × 100
= 157 cm^2
Jawaban = B

[tex]luas = \frac{\pi \times {r}^{2} }{2} \\ \frac{ \frac{314}{100} \times 100 }{2} \\ = \frac{314}{2} \\ = 157[/tex]