** PERIMETERS AND AREAS**

Perimeters of Triangles and Quadrilaterals

The Perimeters of Triangles and Quadrilaterals

Find the perimeters of triangles and quadrilaterals

Perimeter – is defined as the total length of a closed shape.

It is obtained by adding the lengths of the sides inclosing the shape.

Perimeter can be measured in 𝑚𝑚 , 𝑐𝑚 ,𝑑𝑚 ,𝑚,𝑘𝑚 e. t. c

**PERIMETERS AND AREAS**

Examples

**PERIMETERS AND AREAS**

Example 1

Find the perimeters of the following shapes

**Solution**

- Perimeter = 7𝑚 + 7𝑚 + 3𝑚 + 3𝑚 = 20 𝑚
- Perimeter = 2𝑚 + 4𝑚 + 5𝑚 = 11 𝑚
- Perimeter = 3𝑐𝑚 + 6𝑐𝑚 + 4𝑐𝑚 + 5𝑐𝑚 + 5 𝑐𝑚 + 4𝑐𝑚 = 27 𝑐𝑚

Areas of Circle

Calculate areas of circle

Consider a circle of radius r;

**PERIMETERS AND AREAS**

Example 5

Find the areas of the following figures

**PERIMETERS AND AREAS**

Example 6

A circle has a circumference of 30 𝑚. What is its area?

Given circumference, 𝐶 = 30 𝑚

C = 2𝜋𝑟

**PERIMETERS AND AREAS**

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