You will need to be able to use straight edge and a pair of compasses to carry out constructions. Below, the steps for a standard construction are described

## Summary/Background

There are four constructions that you should be able to make using a ruler and compasses

A: the perpendicular bisector of a line

B: an equilateral triangle

C: the midpoint of a line

D: the bisector of an angle

A: the perpendicular bisector of a line

B: an equilateral triangle

C: the midpoint of a line

D: the bisector of an angle

## Software/Applets used on this page

## Glossary

### edge

the line connecting two vertices of a graph, also known as arc or line.

### perpendicular

one line being at right angles to another.

### straight

The type of line produced by a linear equation.

### union

The union of two sets A and B is the set containing all the elements of A and B.