HW 1.4

Front

What is the definition of vertical angles?

Back

Vertical angles are the angles opposite each other when two lines intersect. They are always equal.

Front

What is the definition of adjacent angles?

Back

Adjacent angles are two angles that share a common side and a common vertex but do not overlap.

Front

What is the definition of supplementary angles?

Back

Supplementary angles are two angles whose measures add up to 180 degrees.

Front

What is the definition of complementary angles?

Back

Complementary angles are two angles whose measures add up to 90 degrees.

Front

If ∠1 and ∠2 are vertical angles, what can be said about their measures?

Back

The measures of ∠1 and ∠2 are equal.

Front

If two angles are adjacent and supplementary, what is the relationship between their measures?

Back

The sum of their measures is 180 degrees.

Front

What is the relationship between ∠4 and ∠5 if they are vertical angles?

Back

∠4 and ∠5 are equal in measure.

Front

If ∠3 is 70 degrees, what is the measure of its supplementary angle?

Back

The measure of the supplementary angle is 110 degrees.

Front

If ∠1 is 30 degrees, what is the measure of its complementary angle?

Back

The measure of the complementary angle is 60 degrees.

Front

What is the sum of the measures of all angles around a point?

Back

The sum of the measures of all angles around a point is 360 degrees.