Alternate exterior angles

Alternate exterior angles are formed when a line, called transversal, cuts or intersects two or more lines.

In the figure below, line s is the transversal or the line that cuts or intersects two lines ( line u and line t ).

Alternate exterior angles

Alternate exterior angles are on opposite sides of the transversal and on the outside of the lines the transversal cuts or intersects.

Angle a and angle b are on opposite sides of the transversal or line s and they are located outside line t and line u. Therefore, angle a and b are alternate exterior angles.

By the same token, angle c and angle d are on opposite sides of the transversal or line s and they are located outside line t and line u. Therefore, angle c and d are also alternate exterior angles.

When a transversal intersects two lines, two pairs of alternate exterior angles will always be formed.

Recent math words

  1. Repeating Decimal - Definition and Examples

    Sep 12, 19 04:51 PM

    What is a repeating decimal ? A repeating decimal is a decimal in which ...

    Read More

  2. Reflex Angle - Definition and Examples

    Sep 12, 19 01:00 PM

    What is a reflex angle in geometry ? Definition and examples.

    Read More