CK-12 Geometry-Concepts

http://www.ck12.org Chapter 4. Triangles and Congruence

4.7 SAS Triangle Congruence

Here you’ll learn how to prove that two triangles are congruent given only information about two pairs of sides and
included angles.

What if you were given two triangles and provided with only two of their side lengths and the measure of the angle
between those two sides? How could you determine if the two triangles were congruent? After completing this
Concept, you’ll be able to use the Side-Angle-Side (SAS) shortcut to prove triangles are congruent.

Watch This

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Click image to the left for use the URL below.

URL: http://www.ck12.org/flx/render/embeddedobject/52612

CK-12 Foundation: Chapter4SASTriangleCongruenceA

Watch the portions of the following two videos that deal with SAS triangle congruence.

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URL: http://www.ck12.org/flx/render/embeddedobject/1303

James Sousa: Introduction to Congruent Triangles

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URL: http://www.ck12.org/flx/render/embeddedobject/1304

James Sousa: Determining If Two Triangles are Congruent

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Click image to the left for use the URL below.

URL: http://www.ck12.org/flx/render/embeddedobject/1305