Angles and transversals

Front

What are angles formed when two lines intersect?

Back

Vertical angles are formed when two lines intersect, and they are equal in measure.

Front

What is a transversal?

Back

A transversal is a line that intersects two or more lines at different points.

Front

What are corresponding angles?

Back

Corresponding angles are pairs of angles that are in the same position at each intersection where a transversal crosses two lines.

Front

What is the relationship between alternate interior angles when two parallel lines are cut by a transversal?

Back

Alternate interior angles are equal when two parallel lines are cut by a transversal.

Front

What is the sum of the angles on a straight line?

Back

The sum of the angles on a straight line is 180 degrees.

Front

If m∠1 = 121°, what is m∠2 if ∠1 and ∠2 are supplementary?

Back

m∠2 = 59° because supplementary angles add up to 180°.

Front

What are consecutive interior angles?

Back

Consecutive interior angles are pairs of angles on the same side of the transversal and between the two lines.

Front

If two parallel lines are cut by a transversal, what can be said about the exterior angles?

Back

Exterior angles are equal when the lines are parallel.

Front

What is the measure of angle 5 if angle 4 is 88° and they are corresponding angles?

Back

m∠5 = 88° because corresponding angles are equal.

Front

What is the definition of vertical angles?

Back

Vertical angles are the angles opposite each other when two lines cross, and they are always equal.