9. Perhatikan gambar di bawah ini.

Jawaban:

# Keliling ½ lingkaran

→ Jari jari = 14 cm

→ Diameter = 14 × 2 = 28 cm

K = π × d

= ½ × 22/7 × 28

= ½ × 22 × 4

= 44 cm

# Keliling Gabungan

K = 14 + 44 + 17(3) + 31

= 14 + 44 + 51 + 31

= 140 cm ✔️

semoga membantu,

met belajar skuy 🙂