Similar Triangles and Proportions Flashcard

Front

What are similar triangles?

Back

Triangles that have the same shape but may differ in size. Their corresponding angles are equal, and their corresponding sides are in proportion.

Tags

CCSS.8.G.A.2

CCSS.HSG.CO.B.6

Front

What is the Angle-Angle (AA) similarity criterion?

Back

If two angles of one triangle are congruent to two angles of another triangle, then the triangles are similar.

Tags

CCSS.HSG.SRT.B.5

Front

What is the Side-Side-Side (SSS) similarity criterion?

Back

If the corresponding sides of two triangles are in proportion, then the triangles are similar.

Tags

CCSS.HSG.SRT.B.5

Front

What is the Side-Angle-Side (SAS) similarity criterion?

Back

If one angle of a triangle is congruent to one angle of another triangle and the sides including these angles are in proportion, then the triangles are similar.

Tags

CCSS.HSG.SRT.B.5

Front

How do you determine if two triangles are similar?

Back

Check if they meet any of the similarity criteria: AA, SSS, or SAS.

Tags

CCSS.HSG.SRT.B.5

Front

What is a proportion in mathematics?

Back

An equation that states that two ratios are equal.

Tags

CCSS.7.RP.A.2A

Front

If two triangles are similar, what can be said about their corresponding sides?

Back

The lengths of their corresponding sides are in proportion.

Tags

CCSS.HSG.SRT.A.2

Front

What is the formula for finding a missing side in similar triangles?

Back

If triangle ABC is similar to triangle DEF, then AB/DE = AC/DF = BC/EF.

Tags

CCSS.HSG.SRT.A.2

Front

Solve for x: If triangle ABC is similar to triangle DEF, and AB = 4, DE = 8, and AC = x, DF = 16, find x.

Back

x = 8.

Tags

CCSS.HSG.SRT.A.2

Front

What is the relationship between the areas of two similar triangles?

Back

The ratio of their areas is equal to the square of the ratio of their corresponding sides.