Khan Academy: Classifying Triangles by Angles

In this math worksheet, students analyze an informative chart about the measurement and angles of equilateral, isosceles and scalene triangles. Students then answer 5 questions about classifying triangles.

Here is a classifying triangles practice worksheet in which learners sharpen their problem solving skills as they solve six story problems.

That's correct, it is right and scalene. The video introduces the two methods for classifying triangles, sides, and angles. A resource in the playlist for basic geometry provides the definitions for each of the classifications.

You say you can't categorize a triangle because you don't know the length of the sides. Guess what? If you know the size of the angles you can!

Learn to categorize triangles as scalene, isosceles, equilateral, acute, right, or obtuse.

Discusses the different types of triangles and their angles. [6:00]

If you're looking for a presentation to assist you in your teaching of triangles, this one could be for you. In it, learners are shown how triangles are classified by the size of their angles and by their sides. These are tricky concepts...

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.

In this exercise, students practice classifying shapes by line and angle types. Students receive immediate feedback and have the opportunity to get hints and try questions repeatedly.

Lindsay classifies a shape based on hints about its sides and angles.