Looking for a Supplementary Angles Worksheet?

Supplementary angles add up to 180°. This means that if you were to divide a straight angle into several smaller angles, the total sum of the supplementary angles would be 180°.

This worksheet provides students with the opportunity to calculate the size of the missing supplementary angle on a variety of straight angles. 

An answer key is included with your download to make marking fast and easy!

Tips for Differentiation + Scaffolding 

In addition to independent student work time, use this worksheet as an activity for:

• Whole-class review (via smartboard)
• Guided maths groups
• Independent practice
• Homework assignment
• Summative assessment

Some students may need a reminder of what supplementary angles are when completing the worksheet. Our Complementary and Supplementary Angles Poster is the perfect resource to paste into your students’ workbooks as a visual guide to refer back to while completing the worksheet.

Download This Printable Angles Worksheet

Use the Download button to access the easy-print black-and-white PDF.

Because this resource includes an answer sheet, we recommend you print one copy of the entire file, then make photocopies of the blank worksheet for students to complete. 

Looking for a more sustainable way to use this resource? Project the worksheet onto a screen and work through it as a class by having students record their answers in their notebooks.

Click below for more time-saving angles resources to cut down on your planning time!

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Missing Angle Task Cards

Practise how to find the measure of a missing angle with this set of 18 task cards.

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Advanced Angles Factsheet

Teach your students about angles and their properties with with this easy reference fact sheet.

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I Have, Who Has? – Complementary and Supplementary Angles Game

Play a whole-class game to review complementary and supplementary angles.