Loading please wait

The smart way to improve grades

Comprehensive & curriculum aligned

Try an activity or get started for free

Straight Lines: What's the Unknown Angle?

In this worksheet, students calculate the unknown angle on a straight line.

'Straight Lines: What's the Unknown Angle?' worksheet

Key stage:  KS 2

Curriculum topic:   Geometry: Properties of Shapes

Curriculum subtopic:   Identify Angles at a Point

Difficulty level:  

Worksheet Overview

This activity is about calculating the unknown angle on a straight line.

The angles at a point on a straight line add up to 180°.

180° is half a complete revolution.

 

Angles on a straight line 180

 Notice that 35° + 145° = 180°

e.g. Find the missing angle in degrees.

 

Find the missing angle on a straight line

 

The missing angle is 180° - 65° = 115°

What is EdPlace?

We're your National Curriculum aligned online education content provider helping each child succeed in English, maths and science from year 1 to GCSE. With an EdPlace account you’ll be able to track and measure progress, helping each child achieve their best. We build confidence and attainment by personalising each child’s learning at a level that suits them.

Get started
laptop

Try an activity or get started for free

  • educational
  • bettfutures
  • cxa
  • pta
  • era2016
  • BDA award
  • Explore LearningTuition Partner
  • tacm