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.
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.
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...
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.
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.
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.
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.
Interactive
Quia

Quia: Introduction to Angles

For Students 3rd - 8th Standards
Use this website to practice angle definitions using a matching game format.
Interactive
Quia

Quia: Introduction to Angles Flashcards

For Students 3rd - 8th Standards
Use this website to practice angle definitions using a flash card format.
Interactive
Quia

Quia: Introduction to Angles Concentration

For Students 3rd - 8th Standards
Use this website to practice angle definitions using a concentration game format.
Interactive
Quia

Quia: Introduction to Angles: Word Search

For Students 3rd - 8th Standards
Use this website to practice angle definitions using a word search format.
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.
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.
Lesson Plan
Alabama Learning Exchange

Alex: Angle Scavenger Hunt

For Teachers 3rd - 5th Standards
For this lesson, learners 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 learners will use digital cameras to record...
Handout
Wolfram Research

Wolfram Math World: Cut the Knot! Angles

For Students 9th - 10th Standards
Very good site with links to reviews of various angles.
Activity
Texas Instruments

Texas Instruments: Classifying a Triangles by Their Angle Measure Using Cabri Jr

For Teachers 9th - 10th
This activity uses Cabri Jr to classify triangles according to their angle measure. [Requires Adobe Reader.]
Unknown Type
McGraw Hill

Glencoe Mathematics: Online Study Tools: Triangles and Angles

For Students 9th - 10th Standards
This site gives a short interactive quiz which allows students to self-assess their understanding of the concept of triangles and angles.
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.
Activity
Beacon Learning Center

Beacon Learning Center: Anglemania!

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

Varsity Tutors: Hotmath: Algebra Review: Angle Basics

For Students 9th - 10th Standards
Find a quick, concise explanation of angles and types of angles. Several examples are given to help you understand how angles are formed and the different types of angles.
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: 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...
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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