2.4 Review

Front

What does it mean for two angles to be congruent?

Back

Two angles are congruent if they have the same measure.

Front

If ∠A ≅ ∠D, what can we conclude about their measures?

Back

The measures of ∠A and ∠D are equal.

Front

What is the definition of congruent triangles?

Back

Two triangles are congruent if all their corresponding sides and angles are equal.

Front

In triangle congruence, what does the notation ∆ABC ≅ ∆XYZ indicate?

Back

It indicates that triangle ABC is congruent to triangle XYZ, meaning their corresponding sides and angles are equal.

Front

What is the significance of the statement AB ≅ XY in triangle congruence?

Back

It indicates that side AB of triangle ABC is equal in length to side XY of triangle XYZ.

Front

What type of triangle has all sides of different lengths?

Back

A scalene triangle.

Front

What type of triangle has one angle that is less than 90 degrees?

Back

An acute triangle.

Front

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

Back

Their corresponding angles are also congruent.

Front

What is the relationship between the sides of a scalene triangle and its angles?

Back

In a scalene triangle, the lengths of the sides are all different, and the angles are also all different.

Front

How can you determine the unknown angle measure in a triangle?

Back

You can use the fact that the sum of the angles in a triangle is always 180 degrees.