Pb = 22 cm
- Diketahui: α = 120°
Pb = 88 cm
π = 22/7
Ditanya: r…?
Jawab: Pb = α/360 x 2πr
88 = 120/360 x 2 x 22/7 x r
88 = 1/3 x 44/7 x r
r = (88 x 3 x 7)/44
Pb = 22 cm
- Diketahui: α = 120°
Pb = 88 cm
π = 22/7
Ditanya: r…?
Jawab: Pb = α/360 x 2πr
88 = 120/360 x 2 x 22/7 x r
88 = 1/3 x 44/7 x r
r = (88 x 3 x 7)/44
Editor: Yulia Pramuninggar
Sumber: Buku Matematika Kelas 8 Semester 2