Penjelasan dengan langkah-langkah:
Luas Gabungan = Luas setengah lingkaran + luas segitiga
[tex] =( \frac{1}{2} \pi \times {r}^{2} ) + ( \frac{1}{2} alas \times tinggi) \\ = (\frac{1}{2} \times \frac{22}{7} \times {7}^{2} ) + ( \frac{1}{2} \times 14 \times 20) \\ = ( \frac{22 \times 7}{2} ) + (7 \times 20) \\ = (11 \times 7) + (7 \times 20) \\ = 77 + 140 \\ =217 \: {cm}^{2} [/tex]
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Penjelasan dengan langkah-langkah:
Luas Gabungan = Luas setengah lingkaran + luas segitiga
[tex] =( \frac{1}{2} \pi \times {r}^{2} ) + ( \frac{1}{2} alas \times tinggi) \\ = (\frac{1}{2} \times \frac{22}{7} \times {7}^{2} ) + ( \frac{1}{2} \times 14 \times 20) \\ = ( \frac{22 \times 7}{2} ) + (7 \times 20) \\ = (11 \times 7) + (7 \times 20) \\ = 77 + 140 \\ =217 \: {cm}^{2} [/tex]