This geometry lesson defines equilateral, isosceles, and scalene triangles, and has a variety of exercises, including drawing exercises.

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.

In this instructional activity, learners 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....

A complete reference guide to types of triangles and triangle perimeter and area. It provides definitions and interactive animated activities that enhance further explanation.

Brush up on your math skills relating to the types of triangles then try some practice problems to test your understanding.

Are you looking for a very basic website that will explain the basic properties of a triangle? Use this site to learn about the properties of equilateral triangles, isosceles triangles, right triangles,and scalene triangles. There are...

[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.

Practice problem worksheets are available for students needing to study basic terms relating to triangles and other math concepts.

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.

Here's a great geometry activity to display learners' knowledge of the different types of triangles. Provides resources and adaptations to supplement this instructional activity. (To access this lesson plan, you must register with...

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...

A list of geometry definitions and a matching activity.

MathWorld explains what an isosceles triangle is and how it compares with equilateral, and scalene triangles. The altitude and area of these triangles are also discussed.

In this activity, students investigate properties of triangles by randomly generating possible side lengths for triangles. They learn to determine if three line segments can form a triangle. They also learn to classify triangles as...

Practice identifying triangles by their side-lengths as equilateral, isosceles, or scalene. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

The division of triangles into scalene, isosceles, and equilateral can be thought of in terms of lines of symmetry. Aligns with 4.G.A.3.

Students can practice classifying triangles based on side lengths through a series of self-check exercises and timed learning games.

This site provides definitions of different types of polygons and figures.

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

[Free Registration/Login may be required to access all resource tools.] Students watch a video overview and attempt practice problems on classifying a triangle inside a composite figure.

[Free Registration/Login may be required to access all resource tools.] Students watch a video overview and attempt practice problems on classifying triangles based on length of sides.

Students are assessed on different types of triangles. Definitions of the triangles are included.

A labeled illustration of six different types of triangles.

This Oswego City School District site from the Regents Exam Prep Center provides an explanation of the classifications of triangles both by sides and by angles. Pictures are also included.