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Interactive
Sophia Learning

Sophia: Complementary and Supplementary Angles

For Students 9th - 10th Standards
Complementary and Supplementary angles are explored in this tutorial video. [9:17] A PowerPoint presentation provides definitions of angle terms and a video offers examples for finding the missing angle in a supplementary or...
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Whiteboard
ClassFlow

Class Flow: Angles Votes

For Teachers 3rd - 8th Standards
[Free Registration/Login Required] Using this flipchart, students will be able to identify various angles based on mathematical criteria. Questions are related to right, acute, and obtuse angles.
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Whiteboard
ClassFlow

Class Flow: Angle Tester

For Teachers 3rd - 5th Standards
[Free Registration/Login Required] This flipchart reviews right, acute and obtuse angles with students. An Activote review is included at the end.
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Activity
Analyze Math

Analyze Math: Angles in Geometry

For Students 9th - 10th Standards
Definitions and properties of angles in geometry are explored. Topics discussed are right, acute, and complementary angles. Practice exercises with solutions are included.
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Lesson Plan
Shodor Education Foundation

Shodor Interactivate: Lesson: Angles

For Teachers 3rd - 8th Standards
This upper elementary and middle school lesson plan introduces the concept of acute, obtuse and right angles. Also, as the lesson proceeds vertical, adjacent, alternate interior and alternate exterior angles are explored. Plenty of...
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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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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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Activity
Beacon Learning Center

Beacon Learning Center: Triangles Side by Side

For Students 3rd - 8th Standards
This comprehensive web lesson describes how to classify triangles by their angle and side measurements. It provides real-world examples and exercises for students to practice the skill.
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Unit Plan
Khan Academy

Khan Academy: Draw Right, Acute, and Obtuse Angles

For Students 3rd - 5th Standards
Create an acute, right, or obtuse angle using a given vertex. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
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Unknown Type
Khan Academy

Khan Academy: Draw Right, Acute, and Obtuse Angles

For Students 6th - 8th
Create an acute, right, or obtuse angle using a given vertex.
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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
CK-12 Foundation

Ck 12: Elem Math: Counting Right Angles in a Diagram

For Students 3rd - 5th Standards
[Free Registration/Login may be required to access all resource tools.] Practice counting the number of right angles in a diagram in this learning module. Includes video demonstration of a sample problem [2:11] and practice questions.
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Activity
BBC

Bbc: Bitesize: Math: Angles

For Students 9th - 10th Standards
What is an angle? Read about and see examples of the three different types while learning how to use a protractor. Links to an online game and an interactive quiz.
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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
Other

Visnos: Basic Angles

For Students 3rd - 8th Standards
Explore acute, obtuse, and angle measures in this interactive activity.
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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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Activity
Shodor Education Foundation

Shodor Interactivate: Angles

For Students 9th - 10th Standards
This activity from Shodor Education Foundation will help you learn or review your angle vocabulary.
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Unknown Type
Khan Academy

Khan Academy: Angle Types

For Students 4th Standards
Determine if an angle is acute, right, or obtuse. A protractor is provided.
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Unit Plan
CK-12 Foundation

Ck 12: Elem Math: Classifying Angles as Right, Acute, or Obtuse

For Students 3rd - 5th
[Free Registration/Login may be required to access all resource tools.] In this learning module, students are presented with angles and must identify what type each is. An accompanying video demonstrates a sample problem. [2:10] A set of...
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Handout
Math Open Reference

Math Open Reference: Obtuse Triangle

For Students 9th - 10th Standards
A reference guide to obtuse triangles. It provides a definition and interactive animated activity that enhances further explanation.
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Unknown Type
Math Open Reference

Math Open Reference: Angle Quiz

For Students 6th - 8th Standards
Students are assessed on different types of angles. Definitions of the angles are included.
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Website
Primary Resources

Primary Resources: Angles

For Teachers 3rd - 5th
A great place to find teacher resources on angles. Includes worksheets PowerPoint presentations and smartboard files.
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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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