Question

tentukan luas daerah yang diarsir pada gambar di samping

toling ya kak butuh banget buat besuk selasa​

Answer 1

Verified answer

Jawaban:

[tex]luas \: \frac{3}{4} \: lingkaran \\ = \frac{3}{4} \times \pi \times {r}^{2} \\ = \frac{3}{4} \times 3.14 \times 20 \: cm \times 20 \: cm \\ = \frac{9.42}{4} \times 400 \: {cm}^{2} \\ = 9.42 \times 100 \: {cm}^{2} \\ = 942 \: {cm}^{2} [/tex]

[tex]luas \: persegi \\ = s \times s \\ = 20 \: cm \times 20 \: cm \\ = 400 \: {cm}^{2} [/tex]

[tex]luas \: daerah \: yang \: diarsir \\ = 942 \: {cm}^{2} + 400 \: {cm}^{2} \\ = 1342 \: {cm}^{2} [/tex]

Answer 2

Luas 3/4 lingkaran + persegi

[tex]r \times r \times ( \frac{3}{4} \pi + 1) \\ r \times r \times (3,355) \\ 20 \times 20 \times 3,355 \\ 1342 \: {cm}^{2} [/tex]