Jawaban:
3.738 cm²
Penjelasan dengan langkah-langkah:
[tex]luas \: persegi \: panjang \\ \\ l = p \times l \\ l = 42 \times 56 \\ l = 2.352 \: cm2 \\ \\ luas \: lingkaran \: \\ \\ l = \pi \times {r}^{2} \\ \\ apabila \: diketahui \: diameter : \\ \\ l = \frac{1}{4} \times \pi \times {d}^{2} \\ \\ = \frac{1}{4} \times \frac{22}{7} \times 42 \times 42 \\ = \frac{1}{4} \times \frac{22}{ \cancel 7} \times { {\cancel 42}^{ \: 6} \times \times 42} \\ = \frac{1}{4} \times 22 \times 6 \times 42 \\ l = \frac{1}{4} \times 5.544 \\ = (1.386 \: cm2)[/tex]
luas bangun gabungan:
L = L persegi panjang - l lingkaran
= 2.352 + 1.386
= 3.738 cm²
by : Hina
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