Similar Triangles

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 proportional.

Front

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

Back

Their angles are congruent.

Front

What is the relationship between the sides of similar triangles?

Back

The lengths of their corresponding sides are proportional.

Front

How can you determine if two triangles are similar?

Back

By checking if their corresponding angles are equal or if the sides are in proportion.

Front

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

Back

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

Front

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

Back

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

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.

Front

If triangle ABC is similar to triangle DEF, and the length of side AB is 4 cm and side DE is 8 cm, what is the ratio of their sides?

Back

The ratio of their sides is 1:2.

Front

If the angles of triangle XYZ are 30°, 60°, and 90°, what can be said about any triangle with the same angles?

Back

It is similar to triangle XYZ.

Front

What does it mean for two triangles to be congruent?

Back

They are identical in shape and size, meaning all corresponding sides and angles are equal.