Comparing Angles and Sides in Triangles

Inequality theorems and ordering angles and sides of triangles.

Levels are CK-12's student achievement levels.
Basic Students matched to this level have a partial mastery of prerequisite knowledge and skills fundamental for proficient work.
At Grade (Proficient) Students matched to this level have demonstrated competency over challenging subject matter, including subject matter knowledge, application of such knowledge to real-world situations, and analytical skills appropriate to subject matter.
Advanced Students matched to this level are ready for material that requires superior performance and mastery.

Comparing Angles and Sides in Triangles

This concept teaches students the relationship between opposite angles and sides in triangles and how to use this relationship to compare triangles.
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Comparing Angles and Sides in Triangles

Comparing Angles and Sides in Triangles Interactive
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Comparing Angles and Sides Principles

This video gives more detail about the mathematical principles presented in Comparing Angles and Sides.
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Comparing Angles and Sides Examples

This video shows how to work step-by-step through one or more of the examples in Comparing Angles and Sides.
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Comparing Angles and Sides in Triangles Discussion Questions

A list of student-submitted discussion questions for Comparing Angles and Sides in Triangles.
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• Real World Application

The Secret of the Kitchen Triangle

Find out how triangles are incorporated into the design of home kitchens.
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• Real World Application

Triangle Sum Theorem

Do the angles in a triangle always add up to 180 degrees? How are the lengths of the sides of a triangle controlled by the sizes of the angles in Spherical Geometry?
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• Study Guide