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Acute Angle: GCSE Maths Definition

Dan Finlay

Written by: Dan Finlay

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Contents

  1. 1. What is an acute angle?
  2. 2. Acute angle revision resources to ace your exams

What is an acute angle?

In GCSE maths, an acute angle is an angle formed between two lines that is greater than 0° and less than 90°.

Diagram illustrating different types of angles: acute, right, obtuse, straight, and reflex, with definitions for each angle type.
Types of angles between two lines

An acute angle is smaller than a right angle. If two straight lines cross each other then there will be two pairs of equal angles. All four angles could be right angles; otherwise, one of the pairs will be acute angles.

Two intersecting lines cross an orange circle on the left and a green circle on the right. "Save My Exams" is written at the bottom.
Angles formed by two straight intersecting lines

Acute angle revision resources to ace your exams

You can find out more about acute angles, and other types of angles, by reading our revision notes. To test your knowledge, try our exam questions for the geometry toolkit.

For quick-fire GCSE maths revision, use our collection of interactive flashcards for GCSE maths. We of course also have past papers for your exam practice.

Explore GCSE maths revision resources

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Dan Finlay

Author: Dan Finlay

Expertise: Maths Lead

Dan graduated from the University of Oxford with a First class degree in mathematics. As well as teaching maths for over 8 years, Dan has marked a range of exams for Edexcel, tutored students and taught A Level Accounting. Dan has a keen interest in statistics and probability and their real-life applications.

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