Two angles are complementary if their measures sum to ___ degrees.

90 degrees

If angle A and angle B are supplementary, then the equation ∠A + ∠B equals ___ degrees.

180 degrees

True or False: Linear pairs of angles always add up to 90 degrees.

False; linear pairs of angles always add up to 180 degrees.

Adjacent angles share a common arm and must be ___ in relation to each other.

Next to each other

What is the relationship between vertically opposite angles when two lines intersect?

Vertically opposite angles are equal in measure.

Fill in the blank: Perpendicular lines intersect at an angle measuring ___.

90 degrees

If line L1 is parallel to line L2, then they will never ___ each other.

Intersect

True or False: A transversal line creates four pairs of corresponding angles with two parallel lines.

True

Calculate the measure of angle C if angle A is 30 degrees and they are complementary.

Angle C measures 60 degrees.

If the measure of angle D is 110 degrees, what is the measure of its supplementary angle?

70 degrees

Fill in the blank: The angles ∠1 and ∠2 are interior alternate angles if they are formed by a transversal and two parallel lines, and they are ___ to each other.

Equal

If two angles are a linear pair, what is the sum of their measures?

180 degrees

In a pair of vertically opposite angles formed by two intersecting lines, if one angle measures 45 degrees, what is the measure of the other angle?

45 degrees

Calculate the measure of angle E if it is one of the angles in a linear pair with angle F measuring 120 degrees.

Angle E measures 60 degrees.

If two parallel lines are cut by a transversal, the corresponding angles are ___ to each other.

Equal