Properties of Angles and Lines with Video

What defines two lines as parallel?

• They intersect at a single point.

• They are on different planes.

• They never intersect and are on the same plane.

• They have different slopes.

What is a transversal line?

• A line that connects two points on a single line.

• A line that intersects only one other line.

• A line that intersects two or more lines.

• A line that is perpendicular to another line.

When two lines intersect, what is true about vertical angles?

(a)  

• They are supplementary.

• They are complementary.

• They are always acute.

• They are equal in measure.

If a transversal intersects two parallel lines, what is true about corresponding angles?

• They are supplementary.

• They are equal in measure.

• They are complementary.

• They are always obtuse.

If a transversal intersects two parallel lines, what is true about alternate interior angles?

(a)  

• They are equal in measure.
• They are supplementary.

• They are complementary.

• They are always on the same side of the transversal.