Adjacent angles

Adjacent angles
are two angles in a plane that have a common side and a common vertex.

Adjacent angles

Adjacent angles do not share points in their interior. In other words, they do not overlap.

Therefore, you could not say that angle ABC and angle DBC are adjacent. Angle ABC and angle DBC have a common vertex ( vertex B) and a common side ( side BC ). However, they overlap since angle DBC is included in angle ABC.

Angles that are not adjacent angles

Angle ABC and angle DCB are not adjacent. Although they have a common side that is BC, they do not have  a common vertex.

The vertex of angle ABC is B and the vertex of angle DCB is C.

Nonadjacent angles

For the figure below, angle AED and angle BEC are not adjacent angles. Although they have a common vertex that is E, they have no common side.

Angles that are not adjacent

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

Share this page:
Enjoy this page? Please pay it forward. Here's how...

Would you prefer to share this page with others by linking to it?

  1. Click on the HTML link code below.
  2. Copy and paste it, adding a note of your own, into your blog, a Web page, forums, a blog comment, your Facebook account, or anywhere that someone would find this page valuable.