JAMB - Mathematics (1997 - No. 24)
A chord of a circle of a diameter 42cm subtends an angle of 60o at the centre of the circle. Find the length of the mirror arc
22cm
44cm
110cm
220cm
Vysvětlení
Diameter = 42cm
Length of the arc = \(\frac{\theta}{360°} \times \pi d\)
= \(\frac{60}{360} \times \frac{22}{7} \times 42cm\)
= \(22cm\)