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Sort Angles into Acute or Obtuse

In this worksheet, students will sort angles into acute or obtuse.

'Sort Angles into Acute or Obtuse' worksheet

Key stage:  KS 2

Year:  Year 4 Maths worksheets

Curriculum topic:   Geometry: Properties of Shapes

Curriculum subtopic:   Identify Acute/Obtuse Angles

Popular topics:   Angles worksheets

Difficulty level:  

Worksheet Overview

In this activity, we will practise spotting acute and obtuse angles.


Acute angles are less than 90° and are the smallest type of angle - (that's why they are 'a cute' type of angle!)


happy girl


Obtuse angles are a bit bigger - more than 90°, but less than 180°.


Let's try an example question.



Sort these angles into acute and obtuse.


(a) Obtuse (b) Obtuse (c) Acute



(d) Acute (e) Acute (f) Obtuse




Acute angles: c, d, e.  

These are less than 90° (a right angle).


Obtuse angles: a, b, f.  

These are more than 90° (a right angle) but less than 180° (a straight line).


Are you ready to have a go at sorting some angles out?

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