Question

Sudut pusat lingkaran 60 derajat jika panjang jari jarinya 14 cm tentukanlah panjang busur dan luas juringnya!

Answer 1

Panjang busur
= 60°/360° × K lingkaran
= 1/6 × 2 × π × r
= 1/6 × 2 × 22/7 × 14
= 44/3 = 14 2/3 cm

Luas juring
= 60°/360° × L juring
= 1/6 × π × r^2
= 1/6 × 22/7 × 14^2
= 308/3 = 102 2/3 cm2