Transversals and Angles of Triangles

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 similar positions at each intersection where a transversal crosses two lines.

Front

What are alternate interior angles?

Back

Alternate interior angles are pairs of angles that are on opposite sides of the transversal and inside the two lines.

Front

What are alternate exterior angles?

Back

Alternate exterior angles are pairs of angles that are on opposite sides of the transversal and outside the two lines.

Front

What are vertical angles?

Back

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

Front

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

Back

Angle 2 is also 70 degrees.

Front

If angle 3 is 110 degrees, what is the measure of angle 4 if they are alternate interior angles?

Back

Angle 4 is also 110 degrees.

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 and angle B is 60 degrees, what is the measure of angle C in triangle ABC?

Back

Angle C is 80 degrees.

Front

What is the relationship between the angles formed by a transversal and parallel lines?

Back

When a transversal intersects parallel lines, corresponding angles are equal, and alternate interior angles are equal.