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SSS Triangle Congruenc? Basic

Prove two triangles are congruent with the Side-Side-Side shortcut.

It is an educational content of CK-12 Foundation (to access some of the CK-12 contents you must be logged in).

SSS Similarit? Basic

Use the SSS Similarity Theorem to determine if triangles are similar.

It is an educational content of CK-12 Foundation (to access some of the CK-12 contents you must be logged in).

Identify and Apply Theorems to Triangle Congruenc? At grade

Identifying and applying theorems to determine triangle congruence

It is an educational content of CK-12 Foundation (to access some of the CK-12 contents you must be logged in).

Using the Law of Cosines with SSS (to find an angle? At grade

This lesson covers using the Law of Cosines to find an angle in a triangle.

It is an educational content of CK-12 Foundation (to access some of the CK-12 contents you must be logged in).

Why SSA and AAA Don't Work as Congruence Shortcuts

"Four shortcuts allow students to know two triangles must be congruent: SSS, SAS, ASA, and AAS. Knowing only side-side-angle (SSA) does not work because the unknown side could be located in two differ ...

Triangle Similarity

"There are four triangle congruence shortcuts: SSS, SAS, ASA, and AAS. We have triangle similarity if (1) two pairs of angles are congruent (AA) (2) two pairs of sides are proportional and the includ ...

Hypotenuse Leg

"In right triangles, if two legs are congruent and if the two hypotenuses are congruent, then the triangles are congruent. This is known as the hypotenuse leg theorem. Note that this is the SSA shortc ...

SSS and SAS

"When two triangles are congruent, all three pairs of corresponding sides are congruent and all three pairs of corresponding angles are congruent. If all three pairs of corresponding sides are congru ...

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