Angle Relationships and Finding Missing Angles

Front

What are corresponding angles?

Back

Corresponding angles are pairs of angles that are in the same position on two parallel lines cut by a transversal. They are equal in measure.

Front

What is the relationship between alternate interior angles?

Back

Alternate interior angles are angles that lie between two parallel lines on opposite sides of a transversal. They are equal in measure.

Front

What are vertical angles?

Back

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

Front

What are consecutive interior angles?

Back

Consecutive interior angles are pairs of angles that lie on the same side of the transversal and inside the two parallel lines. They are supplementary, meaning they add up to 180 degrees.

Front

How do you find the measure of an angle if you know its corresponding angle?

Back

If you know the measure of a corresponding angle, the measure of the angle in question is equal to that measure.

Front

What is the sum of the angles in a triangle?

Back

The sum of the angles in a triangle is always 180 degrees.

Front

If angle A is 40 degrees, what is the measure of its corresponding angle?

Back

The measure of the corresponding angle is also 40 degrees.

Front

What is the equation to find the missing angle if two angles are supplementary?

Back

If two angles are supplementary, the equation is: angle1 + angle2 = 180 degrees.

Front

If angle 1 is 70 degrees, what is the measure of angle 2 if they are supplementary?

Back

Angle 2 = 180 - 70 = 110 degrees.

Front

What is the relationship between alternate exterior angles?

Back

Alternate exterior angles are angles that lie outside two parallel lines and on opposite sides of a transversal. They are equal in measure.