Looking for a Complementary Angles Worksheet for 4th Grade?

Complementary angles add up to 90°. This means that if you were to divide a right angle into several smaller angles, the total sum of the complementary angles would be 90°.

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

An answer key is included with your download to make grading 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 complementary angles are when completing the worksheet. Our Complementary and Supplementary Angles Anchor Chart 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

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

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

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

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Comparing and Naming Angles – 4th Grade Math Worksheets

Assess your students’ understanding of angle types with the set of differentiated student worksheets.