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.
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.
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.
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.
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.
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...
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.
Lesson Plan
Alabama Learning Exchange

Alex: Angle Scavenger Hunt

For Teachers 3rd - 5th Standards
In this instructional activity, students will explore straight, right, acute, and obtuse angles. Students will go on a scavenger hunt throughout the school to search for examples of these types of angles. The students will use digital...
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.
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...
eBook
Mathigon

Mathigon: Geometry: Triangles and Trigonometry: Properties of Triangles

For Students 9th - 10th Standards
This lesson focuses on the properties of triangles, a closed shape that has three sides, three vertices, and and three internal angles. There are different types of triangles such as a right triangle, obtuse, and acute based on the...
Whiteboard
ClassFlow

Class Flow: Angle This Way

For Teachers 3rd - 5th Standards
[Free Registration/Login Required] Students will identify right, acute and obtuse triangles using many interactive tools available in ACTIVstudio 3.0. Students will be engaged using a magnifier tool, the fill tool, and drag and drop and...
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.
Unknown Type
Khan Academy

Khan Academy: Recognize Angles

For Students 3rd - 5th Standards
Determine if angles in shapes and pictures are acute, right, or obtuse. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
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.
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.
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.
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.
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.
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.
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...
Handout
Quia

Ixl Learning: Types of Angles

For Students 3rd - 5th Standards
Brush up on your math skills pertaining to types of angles then try some practice problems to test your understanding.
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.
Unit Plan
Khan Academy

Khan Academy: Angle Types

For Students 3rd - 5th Standards
Determine if an angle is acute, right, or obtuse. A protractor is provided. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

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