Chapter 3 Review

Front

What is the measure of angle b if it is complementary to 54°?

Back

Angle b = 36° (because complementary angles sum to 90°)

Front

What is the measure of angle L if it is supplementary to 129°?

Back

Angle L = 51° (because supplementary angles sum to 180°)

Front

Find the value of x if it is an exterior angle of a triangle and the two remote interior angles are 50° and 60°.

Back

x = 130° (exterior angle theorem)

Front

What does it mean for angles A and M to be congruent?

Back

Angles A and M have the same measure.

Front

If triangle ABC is congruent to triangle XYZ, what can we say about their corresponding sides?

Back

AB ≅ XY, BC ≅ YZ, AC ≅ XZ.

Front

What is the definition of complementary angles?

Back

Two angles are complementary if their measures add up to 90°.

Front

What is the definition of supplementary angles?

Back

Two angles are supplementary if their measures add up to 180°.

Front

What is the relationship between vertical angles?

Back

Vertical angles are always congruent.

Front

If two angles are both acute, what can we say about their measures?

Back

Both angles are less than 90°.

Front

What is the sum of the interior angles of a triangle?

Back

The sum is always 180°.