Luas daerah yang diarsir
[tex] \frac{9}{28} \times d \times d \\ \\ \frac{9}{28} \times 7 \: m \times 7 \: m \\ \\ 15,75 \: {m}^{2} \: (a)[/tex]
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Luas daerah yang diarsir
[tex] \frac{9}{28} \times d \times d \\ \\ \frac{9}{28} \times 7 \: m \times 7 \: m \\ \\ 15,75 \: {m}^{2} \: (a)[/tex]