Similar Triangles

Front

Matching angles are called

Back

Corresponding Angles

Front

Two objects that are the same shape but not the same size are _______.

Back

Similar

Front

If two triangles have the same shape, what can we say about their angles?

Back

Their corresponding angles are equal.

Front

If triangle ABC is similar to triangle DEF, what can we say about the sides?

Back

The ratios of the lengths of corresponding sides are equal.

Front

What is the criteria for triangles to be similar?

Back

AA (Angle-Angle) Criterion: If two angles of one triangle are equal to two angles of another triangle, the triangles are similar.

Front

Find side length X if triangle ABC is similar to triangle DEF and the sides are in the ratio 2:3. If side AB = 10, what is side DE?

Back

15

Front

Are the triangles with sides 3, 4, 5 and 6, 8, 10 similar?

Back

Yes, they are similar because the ratios of corresponding sides are equal.

Front

What does it mean for two triangles to be congruent?

Back

They are the same shape and size.

Front

If two triangles are similar, how do their areas compare?

Back

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

Front

Find side length X if triangle ABC is similar to triangle DEF and the sides are in the ratio 1:4. If side AB = 5, what is side DE?

Back

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