**Table of Contents**

- Geometry Tools
- Ruler
- Compass
- Divider
- Set-Squares
- Protractor

- Summary
- What’s Next?

In the first segment of the chapter Practical Geometry, we will learn about geometric tools.

## What are the Geometric Tools?

Geometric tools are instruments used to draw shapes like line, circle, square, rectangle, triangle and so on. These tools include a ruler, compass, divider, set-squares and protractor.

Let us now see how each tool is used in constructing the basic shapes of geometry.

## Ruler

A ruler is a geometrical instrument used to draw and measure straight lines. There are two main components of a ruler:

### Ruler

- A
**straight edge**, which is used to draw line segments or shapes made up of line segments. **Markings**of measurement on its edges, which are used to measure and easily construct line segments of definite lengths.

Generally, a centimetre and millimetre scale is used in geometry. Although, a ruler also has markings for measuring length in inches.

## Compass

A compass comprises two parts – a **pointer **and a **pencil holder **to attach a pencil. It is used to construct circles and angles.

### Compass

Along with a ruler it can be used to draw line segments and triangles as well.

## Divider

A divider looks just like a compass but unlike the latter, it has 2 pointers instead of 1.

### Divider

On its own, a divider cannot be used to draw shapes, but it can definitely be used to compare the size of different shapes that consist of line segments. Paired with a ruler, a divider helps in drawing line segments to the highest accuracy.

## Set squares

Most basic geometric toolsets include 2 types of set squares:

- A right-angled isosceles triangle having the angles 45°, 45° and 90°.
- A right-angled scalene triangle with angles 30°, 60° and 90°.