Classifying Angles
An angle less than 90 degrees
acute angle
two angles that add to 90 degrees
complementary angles
< A and < B are complementary angles. m<A= 30, what is the m<B
60
Name the angle that is made up of ray AB and ray AC
< BAC or < CAB or < A
a path that goes on endlessly in both directions is called
a line
an angle that is 90 degrees
right angle
two angles that add to 180 degrees
supplementary angles
<C and <D are supplemntary angles. m<D = 110, what is the m<c
70
What is the name of the angle formed byray PR and PS
< SPR <RPS <P
a path that is marked with 2 endpoints is
a segment
an angle that is larger than 90 degrees but less than 180
obtuse
adjacent angles
< R and < S are vertical angles. The m<R = 38, what is the measure of < S
38
What is an angle made up of?
two rays that share a common point (vertex)
a path that goes on endlessly in one direction is called
a ray
an angle that is 180 degrees
straight angle
two angles that are opposite of one another and congruent
vertical angles
m<P is 64. If <P and <Q are a linear pair, what is the m<Q
116
True or false
Adjacent angles are always supplementary
false
a 2D surface that goes on indefinitley is
a plane
an angle between 180 and 360 degrees
reflex angle
2 angles that are adjacent and supplemntary
<1 and <3 are vertical angles, and m<3 =42. If <2 is the linear pair to <1, what is m<2
138
True of False
Supplementary angles always form a linear pair
False, only if the supplamentary angles are adjacent
Points that fall on the same 2D surface are called
coplanar points