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.

Concepts

acute triangles, equilateral triangles, isosceles triangles, obtuse triangles, right triangles, scalene triangles

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Additional Tags

math

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Instructional Ideas

• Challenge class members to draw triangles given an angle and side classification, such as right scalene triangle
• Develop a graphic organizer to show the classification of triangles as they relate to angles and sides

Classroom Considerations

• The class should know how to classify angles

• This video is hosted on YouTube

Pros

• Includes walk-throughs of examples
• Contains a link to other CK-12 resources on classification of triangles

Cons

• None

Common Core

4.G.A.2 5.G.B.4 MP6