# Name Triangles and Angles Correctly

In this worksheet, students will name the different types of angles and triangles.

Key stage:  KS 2

Curriculum topic:   Geometry: Properties of Shapes

Curriculum subtopic:   Compare Geometric Shapes

Popular topics:   Geometry worksheets

Difficulty level:

#### Worksheet Overview

In this activity, we will be investigating angle sizes and types of angles.

Here are a few important facts we need to know for our work with triangles!

right angle is 90º

An acute angle is less than 90º

An obtuse angle is between 90º and 180º

straight line angle is 180º

reflex angle is between 180º and 360º

Triangles

A right-angled triangle has one 90º angle.

An isosceles triangle has two equal angles.

An equilateral triangle has three equal angles, each of size 60º

A scalene triangle has three different angles.

Let's try an example question.

Example

Perry draws an angle of 72°

What type of angle is this?

Angles smaller than 90° are acute.

Perry's angle is acute.

If you want to see this introduction again, just click on the red help button that will appear on the screen.

Let's get practising!

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