Adjacent Angles

This is forming four angles, or you could imagine it's forming two sets of vertical angles. So if this is the angle that you care about, it's a vertical angle, it's the one on the opposite side of the intersection. It's one of these angles that it is not adjacent to. …

source:
khanacademy.org

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slideplayer.com

Complementary Angles

The Complementary Angle Relationships (A) Math Worksheet from the Geometry Worksheets Page at Math-Drills.com.

source:
math-drills.com

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math-drills.com

Congruent Angles

The interior and exterior angles in a triangle are related to one another. The following is the description of angle relationships in Triangles. Theorem 5 (Triangle Sum Theorem) The sum of the measures of the interior angles of a triangle is equal to 180 o. Given: Let $\Delta$ABC be a triangle.

source:
mathcaptain.com

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slideserve.com

Supplementary Angles

Pairs of Angles. When parallel lines get crossed by another line (which is called a Transversal), you can see that many angles are the same, as in this example: These angles can be made into pairs of angles which have special names.

source:
mathsisfun.com

image:
math-drills.com

Vertical Angles

Vertical Angle Relationships (A) Welcome to The Vertical Angle Relationships (A) Math Worksheet from the Geometry Worksheets Page at Math-Drills.com. This Geometry Worksheet may be printed, downloaded or saved and used in your classroom, home school, or other educational environment to help someone learn math.

source:
math-drills.com

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math-drills.com