# How do you find the area of a rectangle and circle?

**area of a rectangle**is egin{align*}A = lwend{align*}. The formula to find the

**area**of a

**circle**is egin{align*}A= pi r^2end{align*}. To find the

**area**of a composite shape, simply find the

**area**of each individual shape and add them together.

Accordingly, how do you find the area of shapes?

To **find** the **area** of a square or rectangle, just multiply the width of the **shape** by its height. To **find** the **area** of a circle, start by measuring the distance between the middle of the circle to the edge, which will give you the radius. Then, square the radius and multiply it by pi to **find** the **area**.

**rectangle**with the

**largest area**that can be

**inscribed in a circle**is a square.

Keeping this in consideration, what is the formula for area of a sector of a circle?

The **area of a sector of a circle** is ½ r² ∅, where r is the radius and ∅ the angle in radians subtended by the arc at the centre of the **circle**. So in the below diagram, the shaded **area** is equal to ½ r² ∅ .

There are times when you need to find the **area** of a **shape** that is not a regular **shape**. One method for finding the **area of an irregular shape** is to divide the **shape** into smaller **shapes** which you do have the formula for. Then you find the **area** of all of the smaller **shapes** and add all of your **areas** together.