Search
Number Sense

Number Sense

Understanding numbers, their relationships and numerical reasoning

Algebra

Algebra

Using symbols to solve equations and express patterns

Geometry

Geometry

Studying shapes, sizes and spatial relationships in mathematics

Measurement

Measurement

Quantifying and comparing attributes like length, weight and volume

Operations

Operations

Performing mathematical operations like addition, subtraction, division

Probability and Statistics

Probability and Statistics

Analysing uncertainty and likelihood of events and outcomes

Community Resources
Get started with our Resources
GeoGebra

Calculator Suite

Explore functions, solve equations, construct geometric shapes

GeoGebra Graphing

Graphing Calculator

Visualise equations and functions with interactive graphs and plots

GeoGebra Geometry

Geometry

Explore geometric concepts and constructions in a dynamic environment

GeoGebra 3D Calculator

3D Calculator

Graph functions and perform calculations in 3D

GeoGebra Scientific Calculator

Scientific Calculator

Perform calculations with fractions, statistics and exponential functions

GeoGebra Notes

Notes

Explore our online note taking app with interactive graphs, slides, images and much more

App Downloads
Get started with the GeoGebra Apps
Number Sense

Number Sense

Understanding numbers, their relationships and numerical reasoning

Algebra

Algebra

Using symbols to solve equations and express patterns

Geometry

Geometry

Studying shapes, sizes and spatial relationships in mathematics

Measurement

Measurement

Quantifying and comparing attributes like length, weight and volume

Operations

Operations

Performing mathematical operations like addition, subtraction, division

Probability and Statistics

Probability and Statistics

Analysing uncertainty and likelihood of events and outcomes

Community Resources
Get started with our Resources
GeoGebra

Calculator Suite

Explore functions, solve equations, construct geometric shapes

GeoGebra Graphing

Graphing Calculator

Visualise equations and functions with interactive graphs and plots

GeoGebra Geometry

Geometry

Explore geometric concepts and constructions in a dynamic environment

GeoGebra 3D Calculator

3D Calculator

Graph functions and perform calculations in 3D

GeoGebra Scientific Calculator

Scientific Calculator

Perform calculations with fractions, statistics and exponential functions

GeoGebra Notes

Notes

Explore our online note taking app with interactive graphs, slides, images and much more

App Downloads
Get started with the GeoGebra Apps
  1. Math
  2. Geometry
  3. Angles
  4. Finding the Missing Angle

Finding the Missing Angle

Student Preview
Options Menu

GeoGebra Content Team
By GeoGebra
#geometry
#angles

Practice

GR. 4-5

GRADES 4-5

Skill:

Use addition and subtraction to find unknown measures of non-overlapping angles.

Verified resource

Finding the Missing Angle

info-icon

Find missing angles in diagrams in this activity.

Explore more

Prerequisite Resources

Preview Image

Exploration

GR. 4-5

GRADES 4-5

Parts of a Polygon

Preview Image

Exploration

GR. 4-5

GRADES 4-5

Subtracting Numbers with Regrouping Using Models

Preview Image

Practice

GR. 4-5

GRADES 4-5

Subtraction with Regrouping

More from Angles

Preview Image

Exploration

GR. 6-8

GRADES 6-8

Sum of Interior Angles of a Triangle

Preview Image

Exploration

GR. 6-8

GRADES 6-8

Identifying Parallel Lines Cut by a Transversal

Preview Image

Exploration

GR. 4-5

GRADES 4-5

Naming Angles According to Their Size

Next Resources

Preview Image

Exploration

GR. 6-8

GRADES 6-8

Complementary and Supplementary Angles

Preview Image

Practice

GR. 6-8

GRADES 6-8

Finding Complementary and Supplementary Angles

AboutPartnersHelp Centre
Terms of ServicePrivacyLicense
Graphing CalculatorCalculator SuiteMath Resources

Download our apps here:

Download_on_the_App_Store_Badge_US-UK_RGB_blk_4SVG_092917

© 2025 GeoGebra®