Complementary/Supplementary Angles, Adjacent and vertical angles

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straight line
180 degrees
Complimentary angle
Angles that add up to 90 degrees
Supplementary angle
Two angles whose sum is 180 degrees
acute angle
an angle that measures less than 90 degrees
obtuse angle
An angle that measures more than 90 degrees but less than 180 degrees
parallel lines
lines in the same plane that never intersect
vertex
A point where two or more straight lines meet.
congruent
equal
vertical angle
A pair of opposite congruent angles formed by intersecting lines
adjacent angles
2 angles that share a common side and have the same vertex.
vertical angles
"Across" angles.
Congruent
Same size, same shape.
Adjacent angles
"Next to"
Complementary angles
Equal 90 degrees. Forms an L shape
Supplementary angles
straight line (add up to 180 degrees)
Vertical angles are ALWAYS
Congruent (the same degree measurement)
A straight line means:
The angles MUST add up to 180
When 2 lines intersect, how many angles are formed?
4
In a square, how many right angles are formed?
4
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