In this example, many angles are equal and form pairs of angles with unique names. Click on each name below to see it highlighted: Now play with it here. Try dragging the points, and …

Free parallel angles math topic guide, including step-by-step examples, free practice questions, teaching tips and more!

If two lines are cut by a transversal and the alternate interior angles are congruent, the lines are parallel.

Angles that are in the area between the parallel lines like angle 2 and 8 above are called interior angles whereas the angles that are on the outside of the two parallel lines like 1 and 6 are …

Parallel lines are lines in the same plane that go in the same direction and never intersect. When a third line, called a transversal, crosses these parallel lines, it creates angles. Some angles …

When any two parallel lines are intersected by another line called a transversal, many pairs of angles are formed. While some angles are congruent (equal), the others are supplementary.

The following terms are used to refer to the angle pairs formed by a transversal and a pair of parallel lines. Corresponding angles - angles that occupy the same relative position when a …

As shown by the tick marks, lines a and b are parallel. This can be proved because the transversal t produces congruent corresponding angles , shown here both to the right of the …

Jul 21, 2025 · We can use known angles to prove that two lines are parallel. This diagram shows two horizontal lines that may or may not be exactly parallel, intersected by a third line:

We give angle properties names to help solve problems with angles in parallel lines. For example an “alternate angle”, an alternate angle looks like a Z shape as shown below. Alternate angles …