Similar or Congruent

Front

What are similar figures?

Back

Similar figures are shapes that have the same shape but may differ in size. Their corresponding angles are equal, and the ratios of their corresponding sides are proportional.

Front

What are congruent figures?

Back

Congruent figures are shapes that are identical in shape and size. All corresponding sides and angles are equal.

Front

How do you determine if two triangles are similar?

Back

Two triangles are similar if their corresponding angles are equal or if the ratios of their corresponding sides are equal.

Front

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

Back

The AA similarity postulate states that if two angles of one triangle are equal to two angles of another triangle, then the triangles are similar.

Front

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

Back

The SAS similarity theorem states that if an angle of one triangle is equal to an angle of another triangle and the sides including those angles are in proportion, then the triangles are similar.

Front

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

Back

The SSS similarity theorem states that if the corresponding sides of two triangles are in proportion, then the triangles are similar.

Front

If two angles of a triangle measure 50° and 60°, what is the measure of the third angle?

Back

The third angle measures 70° because the sum of angles in a triangle is 180°.

Front

What is the relationship between parallel lines and angles?

Back

When a transversal crosses parallel lines, it creates pairs of equal corresponding angles and alternate interior angles.

Front

If two triangles are congruent, what can be said about their corresponding sides and angles?

Back

If two triangles are congruent, all corresponding sides and angles are equal.

Front

What is the formula for finding the scale factor between two similar figures?

Back

The scale factor is found by dividing the length of a side of one figure by the length of the corresponding side of the other figure.