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Mapel : Matematika

Kelas : 8

Luas daerah arsiran :

= L. ½ Lingkaran + L. Persegi panjang

= (½ x π x r²) + (panjang x lebar)

= (½ x 22/7 x 7²) + (10 x 7)

= 77 + 70

= 147 cm² → Opsi D ✔

[tex]persegi = p \times l = 70 {cm}^{2} [/tex]
[tex] \frac{1}{2} lingkaran = \\ \frac{1}{2} \times \pi \times 7 \: x \: 7 \\ \frac{1}{2} \times \frac{22}{7} \times 7 \times 7 \\ 11 \times 7 = 77 {cm}^{2} [/tex]

[tex]luas = (70 + 77) {cm}^{2} \\ = 147 {cm}^{2} [/tex]