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Angle Resources

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Angles
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Measuring Angles
Measuring Angles
Exercise
Measuring Angles
Teach students how to measure angles without the confusion of a protractor with this easy to use exercise.
4th grade
Math
Exercise
Angle Measurement: Circus Edition
Angle Measurement: Circus Edition
Game
Angle Measurement: Circus Edition
Geronimo! Kids send clowns across the tent by making angles in this silly circus-themed math game.
4th grade
Math
Game
What's the Angle?
What's the Angle?
Worksheet
What's the Angle?
Once students understand angle basics, challenge them to find missing angles in this exercise!
4th grade
Math
Worksheet
Classifying Angles
Classifying Angles
Exercise
Classifying Angles
Students will become experts at classifying angles after this exercise teaches them the various types.
4th grade
Math
Exercise
Circus Angle Measurement
Circus Angle Measurement
Game
Circus Angle Measurement
Blast off! Kids make angles between 0 and 180 degrees to send Bozo flying across the Big Top in this bizarre geometry game.
4th grade
Math
Game
All About Angles
All About Angles
Lesson Plan
All About Angles
In this lesson, students will use a multi-sensory approach by engaging in a hands on activity with toothpicks to create, explore, and learn about the properties of four different types of angles.
4th grade
Math
Lesson Plan
Geometry and Measurement
Geometry and Measurement
Workbook
Geometry and Measurement
This workbook will challenge your fourth grader with math formulas, shapes practice and angle activities. Kids will also learn how to find areas and perimeters, classify triangles and calculate time.
4th grade
Math
Workbook
Spy Math
Spy Math
Workbook
Spy Math
This book is all about logic puzzles, challenging kids to crack codes and determine answers by process of elimination and by observing clues. It exercises skills like reading, planning and reasoning.
5th grade
Math
Workbook
Geometry Vocabulary: Lines
Geometry Vocabulary: Lines
Lesson Plan
Geometry Vocabulary: Lines
Perpendicular, intersect, parallel! In this lesson, students work in teams to complete a Frayer Model on each of these terms to become masters of geometry vocabulary. Teach this lesson on its own or as support to the lesson What's My Line?
4th grade
Math
Lesson Plan
2-D and 3-D Shapes
2-D and 3-D Shapes
Workbook
2-D and 3-D Shapes
Build a solid geometry foundation with these hands-on shapes. Kids can practice identifying attributes of 2-D and 3-D shapes, then put their knowledge to the test by drawing and making 3-D shapes.
2nd grade
Math
Workbook
Angles and Lines
Angles and Lines
Lesson Plan
Angles and Lines
In this lesson, your students will use their auditory, visual, and kinetic skills to learn about angles. Students will use their artistic and linguistic abilities to learn about angles and lines.
4th grade
Math
Lesson Plan
Geometry 6
Geometry 6
Guided Lesson
Geometry 6
Fourth graders will discover the building blocks of geometry in this unit: points, lines, line segments and rays. Students will explore the properties of different shapes, including symmetry, parallel and perpendicular lines, and 900 angles. Students will apply their understanding as they learn to sort shapes based on these properties.
4th grade
Math
Guided Lesson
Measurement and Data 4
Measurement and Data 4
Guided Lesson
Measurement and Data 4
Representing data on graphs makes math visual and involves some creativity and design. Plotting data using fractional units takes their learning one step further. Also in this unit, students learn to measure using both traditional units (like inches, feet and yards) and metric units, and how to convert measurements within each system. The concept of measurement gets two dimensional when students explore measuring and working with angles.
4th grade
Math
Guided Lesson
Shape Review: Line Segments, Symmetry, and More
Shape Review: Line Segments, Symmetry, and More
Worksheet
Shape Review: Line Segments, Symmetry, and More
Review second grade geometry concepts from two- and three-dimensional shapes to symmetry with this helpful shape study guide.
2nd grade
Math
Worksheet
Shapes From Every Angle
Shapes From Every Angle
Workbook
Shapes From Every Angle
Get in shape for geometry! From 2D to 3D, polygons to prisms, your child will soon be a shape master. After a review of important terms and concepts, he will practice identifying real world shapes.
1st grade
Math
Workbook
Basic Geometry: Anatomy of an Angle
Basic Geometry: Anatomy of an Angle
Worksheet
Basic Geometry: Anatomy of an Angle
Learn some basic geometry with this worksheet all about the angle.
3rd grade
Math
Worksheet
Recognizing Angle Measure as Additive
Recognizing Angle Measure as Additive
Exercise
Recognizing Angle Measure as Additive
Many students don’t realize they can use an angle measures as an additive until they have completed this exercise.
4th grade
Math
Exercise
Describing Angles
Describing Angles
Lesson Plan
Describing Angles
You'll see angles from every angle! Students will describe and compare different angles they see in everyday situations. Use this lesson on its own or use it as support to the lesson Classifying Triangles by Internal Angles.
5th grade
Math
Lesson Plan
What's Your Angle?
What's Your Angle?
Workbook
What's Your Angle?
Whether by sea or by land, kids will sharpen 5th grade geometry skills in a fun way with this workbook.
5th grade
Math
Workbook
What’s Your Angle?
What’s Your Angle?
Lesson Plan
What’s Your Angle?
Obtuse, acute, and right angles, oh my! In this hands-on lesson, students will learn about different kinds of angles through motion. Mastering this pre-geometry skill will help kids tackle advanced math as they get older.
3rd grade
Math
Lesson Plan
Know Your Angles
Know Your Angles
Worksheet
Know Your Angles
How well do you know your angles? Let's find out! Use this geometry resource to help your students identify and differentiate between important angles such as acute, obtuse, straight, and right angles.
4th grade
Math
Worksheet
Measuring Angles
Measuring Angles
Worksheet
Measuring Angles
Put that protractor to good use! In this geometry worksheet your student will practice measuring each of these angles using a protractor.
4th grade
Math
Worksheet
Protractor Practice
Protractor Practice
Worksheet
Protractor Practice
Help students learn how to use a protractor.
4th grade
Math
Worksheet
Tri-Angles
Tri-Angles
Worksheet
Tri-Angles
Find the missing angle in a triangle using addition and subtraction.
4th grade
Math
Worksheet
Adding Angles
Adding Angles
Lesson Plan
Adding Angles
Students will find angle sums using a baseball diamond diagram.
3rd grade
Math
Lesson Plan
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Angle Resources

Angles are an important concept in geometry and are used when working with shapes like circles and triangles. Once your child has mastered using angles, they are ready to start moving on to a higher level math subject, such as algebra. Help your student learn how to work with angles by looking at our different resources, or if your child is ready to move ahead, see how angles are used in triangles.

A Guide to Angles

Angles are used to measure how far something has turned. Below is a guide for getting started with angles.

Parts of an Angle
An angle is made up of two lines called arms. These arms are connected at one end to form a point called the vertex. The angle is then defined to be the amount of turn between each arm.

Types of Angles
Different angles have different names depending on their angle:
  • Acute: an angle that is less than 90 degrees
  • Right: an angle that is exactly 90 degrees
  • Obtuse: an angle that is greater than 90 degrees but less than 180 degrees
  • Straight: an angle that is exactly 180 degrees
  • Reflex: and angle that is greater than 180 degrees
When working with angles, there is also a difference between a positive and negative angle. A positive angle rotates counterclockwise, while a negative angle rotates clockwise.

In more complex math classes, students begin to learn how to determine if angles are congruent, or equal, and how to use angles in math classes like algebra and calculus. To help your student start their journey through angles, check the resources on this page, or move over to our geometry page to learn more about how angles are used in shapes.