Classifying Angles Resources
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Classifying Angles
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Classifying Angles
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 By Standard
 Common Core
All About Angles
Lesson plan
All About Angles
In this lesson, students will use a multisensory 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
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
What’s Your Angle?
Lesson plan
What’s Your Angle?
Obtuse, acute, and right angles, oh my! In this handson lesson, students will learn about different kinds of angles through motion. Mastering this pregeometry skill will help kids tackle advanced math as they get older.
3rd grade
Math
Lesson plan
Classifying Angles
Exercise
Classifying Angles
Students will become experts at classifying angles after this exercise teaches them the various types.
4th grade
Math
Exercise
Types of Angles
Worksheet
Types of Angles
Looking for a worksheet to help practice basic geometry? This printable works with identifying different types of angles.
3rd grade
Math
Worksheet
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
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
Guided Lesson
Identifying Angles
Worksheet
Identifying Angles
In this third grade geometry worksheet, your child will practice identifying right, acute, and obtuse angles.
3rd grade
Math
Worksheet
Geometry: Name That Angle!
Worksheet
Geometry: Name That Angle!
Kids completing this third grade math worksheet practice identifying right angles, acute angles, and obtuse angles.
3rd grade
Math
Worksheet
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
Math Review Part 3: Geometry Galore!
Worksheet
Math Review Part 3: Geometry Galore!
Use this yearend assessment to check students’ grasp of key fourth grade geometry concepts.
4th grade
Math
Worksheet
It's a Maze of Hexagons!
Worksheet
It's a Maze of Hexagons!
Students practice identifying prime numbers, regular polygons, and irregular polygons!
4th grade
Math
Worksheet
Drawing Angles
Worksheet
Drawing Angles
Help your fourth graders take their understanding of angles and lines to the next level with this creative geometry challenge! Students will have fun drawing various types of shapes based on written descriptions and your students' knowledge of angles.
4th grade
Math
Worksheet
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
Obtuse Angles
Worksheet
Obtuse Angles
Introduce your child to different angles starting with an obtuse angle and see him find the obtuse angles in this worksheet.
4th grade
Math
Worksheet
Measure and Classify Angles
Worksheet
Measure and Classify Angles
Students get to practice measuring angles using builtin protractors in this fun geometry activity! After measuring, they'll put their angle knowledge to the test by classifying each angle as acute, obtuse, right, or straight.
4th grade
Math
Worksheet
Vocabulary Cards: Geometry Vocabulary: Lines
Worksheet
Vocabulary Cards: Geometry Vocabulary: Lines
Use these vocabulary cards with the EL Support Lesson: Geometry Vocabulary: Lines.
4th grade
Math
Worksheet
Vocabulary Cards: Describing Angles
Worksheet
Vocabulary Cards: Describing Angles
Use these vocabulary cards with the EL Support Lesson: Describing Angles.
5th grade
Math
Worksheet
Glossary: Geometry Vocabulary: Lines.
Worksheet
Glossary: Geometry Vocabulary: Lines.
Use this glossary with the EL Support Lesson: Geometry Vocabulary: Lines.
4th grade
Math
Worksheet
Glossary: Describing Angles
Worksheet
Glossary: Describing Angles
Use this glossary with the EL Support Lesson: Describing Angles.
5th grade
Math
Worksheet
Treehouse Triangles #1
Worksheet
Treehouse Triangles #1
These "Treehouse Triangle" worksheets break down geometric rules into easy, solvable steps.
5th grade
Math
Worksheet
Classifying Angles Resources
Angles might not be all right, but these resources on classifying angles will make them alright for students! Worksheets introduce the concepts of right, acute, and obtuse angles, and provide students with practice classifying angles. Lesson plans include handson activities to help students improve their geometry skills in a fun way. For more angle exercises, review our measuring angles resources.
When students are first introduced to geometry, they’ll realize they see angles everywhere. Whenever two lines meet, they form an angle. Angles are present in all twodimensional and three dimensional shapes whenever two sides or edges meet. Depending on their measurement, they can also be categorized.And angle is comprised of three pieces; two lines and a vertex where the lines meet. Because the angle is viewed as and measured as an arc, the unit we use for measuring an angle is a degree. A full rotation would be 360 degrees. Angles fall into at least one of five main categories:
 Straight Angles  Straight angles are those where the two lines are parallel and could constitute a single line. The measure of a straight angle is always 180 degrees and would perfectly bisect the full circle of the arc.
 Right Angles  A right angle occurs when the two lines that constitute the angle are perpendicular to each other. This results in a 90 degree angle that would represent one quarter of the full arc.
 Obtuse Angles  Obtuse angles are any angle whose measure is greater than 90 degrees and less than 180 degrees.
 Acute Angles  When an angle’s measure is less than 90 degrees, it is called an acute angle.
 Reflex Angles  When an angle is larger than 180 degrees but still less than a full 360 degree rotation, it is called a reflex angle.
Working with students on measuring and categorizing angles using the resources provided by Education.com above may help them not only understand angles but also give them a greater geometrical sense overall.