11D Angles formed by Parallel Lines and a Transversal

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 corresponding angles?

Back

Corresponding angles are the angles that are in the same position at each intersection where a straight line crosses two others. They are equal when the lines are parallel.

Front

What are alternate interior angles?

Back

Alternate interior angles are the pairs of angles on opposite sides of the transversal but inside the two lines. They are equal when the lines are parallel.

Front

What are alternate exterior angles?

Back

Alternate exterior angles are the pairs of angles on opposite sides of the transversal but outside the two lines. They are equal when the lines are parallel.

Front

What are same-side interior angles?

Back

Same-side interior angles are the pairs of angles on the same side of the transversal and inside the two lines. They are supplementary when the lines are parallel.

Front

If angle 4 = x + 15 and angle 2 = 3x - 5, what is the value of x?

Back

x = 10

Front

If angle 6 is 25 degrees, how many degrees is angle 7?

Back

Angle 7 is 155 degrees.

Front

What is the relationship between angle 2 and angle 6 when the lines are parallel?

Back

Angle 2 and angle 6 are corresponding angles and are equal.

Front

What is the sum of the interior angles on the same side of a transversal?

Back

The sum of the same-side interior angles is 180 degrees.

Front

How do you identify corresponding angles in a diagram?

Back

Look for angles that are in the same relative position at each intersection of the transversal with the parallel lines.