The area of a quadrant is the measure of the amount of surface enclosed by the quadrant. A quadrant is one-quarter of the area of a circle. When two radii of a circle are at a right angle to each other they formed an angle of 90°. The area occupied by these two radii is called the area of a quadrant. This page will discuss the area of a quadrant in detail.
How to find the area of a quadrant
The area of an enclosed (quadrant) is measured by finding the number of times a standard unit area will fit exactly into it. Since the area of the quadrant is a quarter of the area of a circle, we take one-fourth of the area of a circle to find the area of a quadrant. i.e the formula for finding the area of a quadrant is = 1/4 × πr2, where π = 22/7 and r = radius of the circle. Let’s understand the area of a quadrant by working through some examples.
Example 1. If the area of a circle is 180cm2. Find the area of the quadrant of the circle. [Take π = 22/7]
Solution
The area of a quadrant = 1/4 ×πr2, where π=22/7 and the area of the circle = 180cm2
= 1/4 × 22/7 × 180cm2
= 1/4 × 3.142 × 180cm2
= 1/4 × 565.56
= 141.39cm2
∴ The area of the quadrant = 141.39cm2
Example 2. If the radius of a circle is 7cm. Find the area of a quadrant. [Take π = 22/7]
Solution
The area of a quadrant = 1/4 × πr2, where π = 22/7, and r = 7cm.
= 1/4 × 22/7 × 72
= 1/4 × 22 × 7
= 154/4
= 38.5cm2
∴ The area of a quadrant = 38.5cm2