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26 terms

Geometry Honors Chapter 1

Chapter 1 Vocabulary
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equidistant
equal or same distance
point
simplest term in geometry
distinct spot of identification
line
infinite number of points. Continues indefinitely in both directions
plane
extends without ending and has no thickness
collinear
points on the same line
coplanar
points on the same plane
intersection
two lines, rays, segments that meet or cross
noncollinear points
points not on the same line
segment
two points on the line and all the points between them. The two points are called the endpoints
ray
has one endpoint and continues to infinity in one direction
postulate
statement accepted as true
angle
formed by intersection of two rays
opposite rays
rays sharing a common endpoint but going in opposite directions
congruent
of equal or same measure
midpoint of a segment
a point which divides a segment in two equal smaller segments
bisector of a segment
is a line, segment, or ray or plane that intersects the segment at its midpoint
sides of an angle
the two rays which make up the angle
vertex
point at which two rays meet to form an angle.
acute angle
measure between 0 and 90
right angle
measures 90 degrees exactly
obtuse angle
measures between 90 and 180 degrees
straight angle
measures 180 degrees exactly. A straight line is a straight angle
protractor
measures the size of an angle
congruent angles
angles that have the same measure
adjacent angles
angles with a common side and common vertex
bisector of an angle
is the ray that divides the angle into two congruent adjacent angles