1.2 define and measure angles Flashcards
1
Q
part of a line that starts at an endpoint and extends forever in one direction
A
ray
2
Q
formed by two line segments or rays that share the same endpoint
A
angle
3
Q
common endpoint of the two rays that form an angle
A
vertex
4
Q
two angles in the same plane with a common vertex and a common side, but no common interior points
A
adjacent angles
5
Q
less than 90 degrees
A
acute
6
Q
90 degrees
A
right
7
Q
higher than 90 degrees
A
obtuse
8
Q
right at 180 degrees
A
straight
9
Q
greater than 180 less than 360
A
reflex
10
Q
the ____ of an angle bisects the angle
A
angle bisector
11
Q
if the sum of their angle measures is equal to 180
A
supplementary
12
Q
if the sum of their angle measure is equal to 90
A
complementary
