JAMB - Mathematics (2010 - No. 13)
An arc subtends an angle of 50º at the center of circle of radius 6cm. Calculate the area of the sector formed
100/7
80/7
110/7
90/7
คำอธิบาย
Area of a sector = \(\frac{\theta}{360}\) x \(\pi\)r\(^2\)
= \(\frac{50}{360} \times \frac{22}{7}\) x 36
= \(\frac{110}{7}\)