How do you find the area of circles and sectors?
The area of a circle is calculated using the formula area = pi multiplied by the radius to the power of 2. An annulus is the area between a large and small circle that has the same centre. A sector is part of a circle. This post will show you how to find the area of different types of circles and sectors in Prelim Standard Math.
How to calculate the area of a sector and annulus
The videos below explain how to calculate the area of a sector and annulus by using the formulas.
Part 2: sector
Part 3: annulus