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# Construct a perpendicular bisector

## Lesson details

### Key learning points

1. In this lesson, we will learn how to construct a perpendicular bisector using a compass, ruler, pencil and paper.

### Licence

This content is made available by Oak National Academy Limited and its partners and licensed under Oak’s terms & conditions (Collection 1), except where otherwise stated.

## Video

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## Worksheet

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## Starter quiz

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### 3 Questions

Q1.
To construct an RHS triangle, which of the following pieces of information are needed?
a) A right-angle and a hypotenuse
Correct answer: b) A right-angle, a hypotenuse and another side
c) Just a right-angle
Q2.
To construct an ASA triangle, which of the following pieces of information are needed?
Correct answer: a) Two angles joined by the same line segment
b) Two sides subtended by the same angle
c) A side and an angle
Q3.
To construct an SSS triangle, which of the following pieces of information are needed?
a) Two angles joined by the same line segment
b) Two sides subtended by the same angle
Correct answer: c) Three sides

## Exit quiz

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### 3 Questions

Q1.
What is a perpendicular bisector?
a) A straight line which is parallel to another line
b) A straight line which intersects another straight line at any point
Correct answer: c) A straight line which intersects another straight line through the midpoint
Q2.
A
C
Q3.
Which of these is the correct first step to create a perpendicular bisector?
Correct answer: a) Set the compass to more than half of the length of the line
b) Set the compass to less than half of the length of the line
c) Set the compass to a quarter of the length of the line