Bagian yang di warnai = 2/4 bagian
r = 7 cm
[tex] \tt = \frac{2}{4} \pi {r}^{2} [/tex]
[tex] \tt = \frac{1}{2} \times \frac{22}{7} \times {7}^{2} [/tex]
[tex] \tt = \frac{22}{14} \times 49[/tex]
[tex] \tt = \frac{1.078}{14} [/tex]
= 77 cm²
@BeruangGemoy :•
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Soal A.
Bagian yang di warnai = 2/4 bagian
r = 7 cm
[tex] \tt = \frac{2}{4} \pi {r}^{2} [/tex]
[tex] \tt = \frac{1}{2} \times \frac{22}{7} \times {7}^{2} [/tex]
[tex] \tt = \frac{22}{14} \times 49[/tex]
[tex] \tt = \frac{1.078}{14} [/tex]
= 77 cm²
@BeruangGemoy :•