[Free Registration/Login Required] This flipchart is a look at angles in geometry. Drawing, labeling, measuring, special angles: (right, straight, acute, obtuse) and congruence.

[Free Registration/Login Required] This flipchart uses the protractor tool to understand the classification and naming of angles: acute, obtuse and right.

Practice identifying triangles by their angles as acute, right, or obtuse. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

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...

[Free Registration/Login Required] Practice identifying different types of angles in this flipchart. See examples of the different angles.

[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.

Review the following types of angles: acute, right, obtuse, and straight. Identify and draw types of angles in some practice problems.

Explore acute, obtuse, and angle measures in this interactive activity.

Very good site with links to reviews of various angles.

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...

This activity uses Cabri Jr to classify triangles according to their angle measure. [Requires Adobe Reader.]

This site gives a short interactive quiz which allows students to self-assess their understanding of the concept of triangles and angles.

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.

Students explore four types of angles in this interactive web lesson.

In this Cyberchase video segment, Harry tries to snowboard and learns how to measure and identify many common angles.

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.

Use this website to practice angle definitions using a matching game format.

Use this website to practice angle definitions using a flash card format.

Use this website to practice angle definitions using a concentration game format.

Use this website to practice angle definitions using a word search format.

[Free Registration/Login Required] This flipchart gives an introduction to angles, reading a protractor, naming and classifying angles. It also includes opportunities to practice these skills. The lesson is aligned with the 5th grade...

[Free Registration/Login Required] This lesson is a thorough review of all types of angles (e.g. obtuse, right, scalene, isosceles, equilateral, alternate) with wonderful diagrams to reinforce thinking skills.

In this lesson, students learn to classify triangles by the size of the angles and the measures of the sides. Students will use interactives to explore equilateral, isosceles, scalene, acute, obtuse, and right triangles. Included are...

Students will learn how to apply the properties and characteristics of all triangles to solve real-world problems and identify and use the unique characteristics of right, isosceles, equilateral, acute, obtuse, and scalene triangles.