January 25th Flashcardziz Vertical Angles and Linear Pair Angles

Front

What are vertical angles?

Back

Vertical angles are the angles that are opposite each other when two lines intersect. They are always congruent, meaning they have the same measure.

Front

What is a linear pair of angles?

Back

A linear pair of angles consists of two adjacent angles formed when two lines intersect. The sum of the angles in a linear pair is always 180 degrees.

Front

If angle A measures 70 degrees, what is the measure of its vertical angle?

Back

70 degrees, because vertical angles are congruent.

Front

What is the relationship between adjacent angles in a linear pair?

Back

Adjacent angles in a linear pair are supplementary, meaning their measures add up to 180 degrees.

Front

Define congruent angles.

Back

Congruent angles are angles that have the same measure.

Front

If angle 1 and angle 2 are a linear pair and angle 1 measures 50 degrees, what is the measure of angle 2?

Back

130 degrees, because angle 2 must be supplementary to angle 1 (180 - 50 = 130).

Front

What is the sum of the measures of two angles that form a linear pair?

Back

The sum is always 180 degrees.

Front

Identify the angles that are vertical to angle 3 in the figure.

Back

The angles that are vertical to angle 3 are the angles that are opposite to it when two lines intersect.

Front

What does it mean for angles to be adjacent?

Back

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

Front

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

Back

Their measures are equal.