Complementary/Supplementary Angles, Adjacent, & Vertical Angles
straight line
180 degrees
adjacent angles (definition)
2 angles that share a common side, common vertex, and do not overlap
When 2 lines intersect, how many angles are formed?
4
vertical angles
A pair of opposite congruent angles formed by intersecting lines
vertex
A point where two or more straight lines meet.
obtuse angle
An angle that measures more than 90 degrees but less than 180 degrees
Vertical angles are ALWAYS
Congruent (the same degree measurement)
A straight line means:
The angles MUST add up to 180
acute angle
an angle that measures less than 90 degrees
congruent
equal
parallel lines
lines in the same plane that never intersect
Adjacent angles
right "next to"
Supplementary angles
two angles whose sum is 180 degrees
Complementary angles
two angles whose sum is 90 degrees
