Triangle Similarity 1

Front

What is essential for two triangles to be considered similar?

Back

Congruent angles

Front

What is the sum of angles in any triangle?

Back

180 degrees

Front

What happens to the angles of a triangle if its size is changed?

Back

The angles remain the same

Front

How many angles need to be congruent for two triangles to be similar by the Angle-Angle theorem?

Back

Two

Front

Why do you not need to find all three angles to use the Angle-Angle theorem?

Back

Because two angles are enough to determine the third.

Front

For the Side-Angle-Side similarity, what must be true about the angle?

Back

It must be congruent.

Front

What ratio must the sides of two triangles have for them to be similar by the Side-Side-Side theorem?

Back

The same ratio

Front

In the context of similar triangles, what does it mean if two triangles are similar by the Side-Angle-Side theorem?

Back

They have two sides in the same ratio and one congruent angle between them.

Front

If two triangles have sides in the ratio 1:2, what theorem can be used to prove they are similar?

Back

Side-Side-Side

Front

Which theorem is applied if two triangles have two sides in the same ratio and the angle between those sides is congruent?

Back

Side-Angle-Side