Download Angle relationship notes

Angle Relationships
Angle Type
Adjacent angles
Description
Angles that share a vertex and side (next to each
other)
Example
Relationship
Supplementary
(when two lines
intersect)
Vertical angles
Non-adjacent angles formed by two intersecting
lines (across from each other)
Congruent
Supplementary
angles
Two angles whose measures have a sum of 180°
Supplementary
Complementary
angles
Two angles whose measures have a sum of 90°
Complementary
Alternate interior
angles
Formed when a line intersects two other lines. They
are on opposite sides of the intersecting line & are
between two other lines
Congruent
Alternate exterior
angles
Formed when a line intersects two other lines. They
are on opposite sides of the intersecting line & are
outside the other two lines
Congruent
Same-side interior
angles
Formed when a line intersects two other lines. They
are on the same side of the intersecting line & are
inside the other two lines
Supplementary
Same side exterior
angles
Formed when a line intersects two other lines. They
are on the same side of the intersecting line & are
outside the other two lines
Supplementary