11+ Maths: Understanding Angles
19 October 2026
What is an angle
An angle is formed when two lines meet at a point. This meeting point is called the vertex. Angles are measured in degrees, which show the amount of turn between the two lines.
Why angles matter for 11+ Maths
Understanding angles is important because questions about them appear in many 11+ exams. Children need to recognise different types of angles, estimate their size, and use angle facts to solve problems.
Types of angles
There are three main types your child should know. Acute angles are less than 90 degrees, right angles are exactly 90 degrees, and obtuse angles are between 90 and 180 degrees. These types appear in shapes and diagrams throughout 11+ Maths.
Angles in shapes
Angles are not just single turns. They are found inside shapes like triangles, quadrilaterals and regular polygons. Each shape has its own set of angle rules, which help children solve more complex questions. For more detail on these, see our guides to angles in triangles, quadrilaterals and regular polygons.
Key insight: Learning to spot and name angles quickly helps children build confidence. Recognising angle types and knowing their properties makes it easier to answer a wide range of geometry questions.
Supporting your child
Encourage your child to practise identifying angles in everyday objects and in their homework. Simple activities, like spotting right angles around the house or using a protractor together, can make a real difference.
