Question

Luas tembereng yang diarsir pada gambar berikut adalah ... cm
a.28,27
b.18
c.36
d.10,27

tlong bntu jan ngasal sama pake cara​

Answer 1

[tex]\begin{aligned}& L_{tembereng} \\ & = L_{juring} - L_{segitiga} \\& =\left (\frac{\theta}{{360}^{\circ}} \times \pi{r}^{2}\right) - \left ( \frac{1}{2}\times {r}^{2} \times sin~\theta \right) \\& =\left (\frac{ {90}^{ \circ} }{{360}^{\circ}} \times 3.14 \times {6}^{2}\right)-\left (\frac{1}{2} \times {6}^{2} \times sin~ {90}^{\circ}\right)\\& = \left(\frac{1}{ \not4} \times 3.14 \times \cancel{36} { \: }^{9}\right) - \left ( \frac{1}{ \not2} \times \cancel{36} { \: }^{18} \times 1 \right) \\& =(3.14 \times 9) - 18 \\& =28.26 - 18 \\& =10.26 \: cm \end{aligned}[/tex]

Nilai yang mendekati adalah 10,27 cm (opsi d)

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