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Lesson Plan
Shodor Education Foundation

Shodor Interactivate: Lesson: Angles (Elementary)

For Teachers 3rd - 5th Standards
In this lesson students will learn what determines whether an angle is acute, obtuse or a right angle.
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Website
Ducksters

Ducksters: Kids Math: Angles Glossary and Terms

For Students 9th - 10th Standards
Math glossary and terms on angles for kids. Learn the definitions used in this mathematics subject such as acute, obtuse, and right angles on this site.
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Unit Plan
CK-12 Foundation

Ck 12: Geometry: Angle Classification Grade 7

For Students 7th
[Free Registration/Login may be required to access all resource tools.] Classify angles as acute, obtuse, right or straight.
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Unit Plan
CK-12 Foundation

Ck 12: Geometry: Angle Classification

For Students 9th - 10th
[Free Registration/Login may be required to access all resource tools.] Classify angles as acute, obtuse, right or straight.
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Handout
Math Open Reference

Math Open Reference: Angles

For Students 9th - 10th Standards
Everything you wanted to know about angles and more, including 1) how to measure angles 2) types of angles 3) angle relationships and 4) angles around a transversal.
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Lesson Plan
Oswego City School District

Regents Exam Prep Center: Angles and Triangles

For Teachers 9th - 10th Standards
On this site a viewer can learn about the different types of triangles, and categorized by either angles or sides. Tutorials are also included for interior and exterior angles of triangles. A teacher resource page includes a lesson plan...
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Unit Plan
CK-12 Foundation

Ck 12: Elem Math: Classifying Right Obtuse or Acute by Angle Measure

For Students 3rd - 5th Standards
[Free Registration/Login may be required to access all resource tools.] Students watch a video and attempt practice problems on how to classify triangles based on angle measures.
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Activity
Varsity Tutors

Varsity Tutors: Hotmath: Graphing Calculator Practice Problems: Point, Line, Planes, Angles

For Students 9th - 10th Standards
Practice using your graphing calculator for drawing and labeling points, lines, planes, and angles. If you get stumped or if you would like to check your work, then select the View Solution button, which is located directly under each...
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Unit Plan
CK-12 Foundation

Ck 12: Angle Classification

For Students 4th - 8th
[Free Registration/Login Required] Students explore classifying angles by navigating through the interactive learning module and then answering questions that go along with the module. Students can also learn more about the concept by...
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Whiteboard
ClassFlow

Class Flow: Angle Measurement

For Teachers 9th - 10th Standards
[Free Registration/Login Required] This flipchart uses the protractor tool to understand the classification and naming of angles: acute, obtuse and right.
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Unit Plan
CK-12 Foundation

Ck 12: Trigonometry: Pythagorean Theorem to Classify Triangles

For Students 10th - 12th Standards
[Free Registration/Login may be required to access all resource tools.] Use the Pythagorean Theorem to determine if triangles are acute, obtuse, or right triangles.
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Unit Plan
CK-12 Foundation

Ck 12: Volume of Pyramids: Right Angles in a Game of Pool

For Students 4th - 8th Standards
[Free Registration/Login Required] Students explore classifying angles by navigating through the interactive learning module and then answering questions that go along with the module. Students can also learn more about the concept by...
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Interactive
ABCya

Ab Cya: Bow and Angle

For Students 3rd - 6th
Join the heroes Loxley, Arrowyn, Busido, and Mockingbird in this epic adventure of Bows and Angles! Practice measuring and reading angles while you defend yourself from treacherous shadow ninjas.
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Activity
Math Is Fun

Math Is Fun: Angles

For Students 9th - 10th Standards
Definitions of different types of angles along with images and an interactive tool through which you can create acute, right, straight, obtuse, and reflex angles. View the parts of an angle, and learn the proper way to label angles.
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Lesson Plan
Homeschool Math

Homeschool Math: Lines, Rays, and Angles

For Teachers 4th - 5th Standards
This fourth-grade geometry lesson teaches the definitions for a line, ray, angle, acute angle, right angle, and obtuse angle. We also study how the size of the angle is ONLY determined by how much it has "opened" as compared to the whole...
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Lesson Plan
Better Lesson

Better Lesson: Finding Angles

For Teachers 3rd - 4th Standards
The three types of angles, right, acute, and obtuse, exist in our everyday surroundings. Young scholars find these angles using classroom items.
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Unit Plan
CK-12 Foundation

Ck 12: Geometry: Angle Classification Grade 6

For Students 6th
[Free Registration/Login may be required to access all resource tools.] Classify acute, right, obtuse, and straight angles.
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Handout
Khan Academy

Khan Academy: Angle Types Review

For Students 4th Standards
Review the following types of angles: acute, right, obtuse, and straight. Identify and draw types of angles in some practice problems.
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Activity
Beacon Learning Center

Beacon Learning Center: Anglemania!

For Students 3rd - 5th Standards
Students explore four types of angles in this interactive web lesson.
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Activity
Shodor Education Foundation

Shodor Interactivate: Angles

For Students 6th - 8th Standards
The activity allows students to practice identifying different types of angles. An interactive activity and teacher resources are included.
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Unit Plan
Scholastic

Scholastic: Study Jams! Math: Geometry: Classify Angles

For Students 3rd - 6th Standards
Watch and learn how to classify angles then test your knowledge.
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Unknown Type
Khan Academy

Khan Academy: Angle Types

For Students 3rd - 5th Standards
In this exercise, students practice identifying angle types. Students receive immediate feedback and have the opportunity to get hints and try questions repeatedly.
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Interactive
Doina Popovici

Math Play: Classifying Angles Game

For Students 4th - 6th Standards
Play Tic Tac Toe while practicing your skills of identifying an angle as being acute, obtuse, right, or straight in this online game.
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Activity
Texas Instruments

Texas Instruments: Classifying Angles

For Teachers 6th - 8th Standards
Students will create a variety of angles using the Geoboard APP. The teacher will use Screen Capture to display the angles created by the students and will lead a discussion on whether the angles are acute, right, or obtuse.

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