Mathematics for IGCSE & O level - Mensuration (Section 1 - No. 22)
Which of the following is the correct formula for calculating the area of a sector of a circle?
Area = (θ/360) * πr²
Area = πr²
Area = 1/2 * r² * θ (in radians)
Area = 2πr
Giải thích
The area of a sector uses the central angle (θ) or the fraction of the circle.