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.

What has three sides and is adorable? A-cute triangle. The resource introduces triangles and how to classify them by sides and angles or both. The video concludes with using the sum of the angles of a triangle to show how to solve for a...

Triangles are classified by their angle measurement as well as by the length of their sides. Here are some names that identify the types of triangles: right, isosceles, equilateral, scalene, obtuse, and acute. Watch this video to learn...

Jam on with this multi-faceted activity teaching triangle classification. Start with a learner-paced lesson describing the different qualities of triangles and follow with a fun karaoke session. Also provided are two types...

Triangles are classified by their angle measurement as well as by the length of their sides. Here are some names that identify the types of triangles: isosceles, equilateral, scalene, obtuse, and acute. Watch this video to learn about...

Triangles are classified by their angle measurement as well as by the length of their sides. Here are some names that identify the types of triangles: right, isosceles, equilateral, scalene, obtuse, and acute. Watch this video to learn...

The Pythagorean Theorem works for something other than right triangles; show your class all it can do. Using information from the Pythagorean Theorem, the video shows how to determine whether a triangle is an acute or obtuse triangle....

What makes a polygon a regular polygon? Does this mean there are irregular polygons? For a polygon to be classified as a regular polygon, all the sides must be congruent and all the angles must be congruent. Those are the two rules that...

What shapes classify as a polygon? The resource provides the definition of a polygon and provides examples of polygons and shapes that are not polygons. The presentation gives an explanation of why each shape falls into the particular...

In this video tutorial, students learn how to classify triangles based on the angles. Topics include right, obtuse, and acute triangles. A short assessment is included to follow the lesson. [4:40]

[Free Registration/Login may be required to access all resource tools.] Students watch a video overview on how to classify triangles.

If you know what kind of triangle you're looking at, it's much easier to figure out how to solve for various sides and angles. Use this tutorial to practice classifying triangles. [7:15]

[Free Registration/Login may be required to access all resource tools.] Students watch a video overview on how to find missing angles in triangles.

This video lesson shows examples of classifying triangles by their angle measurements. Students can check their understanding with an assessment. [3:54]

This video lesson describes and provides examples of right, acute, and obtuse triangles. Students can check their understanding with an assessment. [2:24]

Explains how to classify a triangle just by knowing the angle sizes. [5:30]

This tutorial provides practice in classifying triangles which is useful when figuring out how to solve for various sides and angles. [7:15]

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

Work through sample problems categorizing triangles as scalene, isosceles, equilateral, acute, right, or obtuse.

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

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!