Definition
Term is a statement that defines a mathematical object
Undefined term
Basic mathematical term that is not defined using other mathematical terms; point, line, plane
Point
Names a location and has no sides
Line
a straight path that has no thickness and extends forever
Collinear points
any sets of points that lie on the same line
noncollinear points
if points do not lie on the same line
Plane
a flat surface that has no thickness ad extends forever
Coplanar
lines or points that are in the same plane
Noncoplanar
if there is no plane that contains the lines or points
interaction
is the set of points in which two figures meet
Space
set of all points
line segment
is a part of a line consisting of two endpoints
endpoints
a point at the end of a line segment or at that starting point of the ray
Congruent
Two geometric objects that have the same size and shape
Congruent Segments
two geometric objects that have the same length
length
distance of an object
Congruent statment
shows that two figures are congruent by listing same parts
Tick marks
marks used on a figure to indicate congruent segments
Postulate
a statement that is accepted as true without proof
Distance
the measure of the segment connecting two points
midpoint
the point that divides a segment into two congruent segments
Ray
is a part of a line that starts at an endpoint and extends infinitely in one direction
opposite rays
two rays that have a common endpoint and form a line
angle
is a figure formed by two rays with a common endpoint
vertex
the common endpoint of the angle
sides
the side of a angle
protractor
tool used to measure angles
degrees
angles are measured with degrees
acute angle
greater than 0 and less than 90
obtuse angle
greater than 90 and less than 180
right angle
exactly 90
straight angle
exactly 180
bisect
divide into two congruent parts
angle bisector
ray that divides an angle into two congruent angles
Congruent angles
have the same measurements
arc marks
marks used on a figure to indicate linear units
Perpendicular lines
lines that intersect to forum a right angle
Parallel lines
coplanar lines that do not intersect
Paralel planes
planes that do not intersect
skew lines
lines that are not in the same plane and do not intersect
Parallel lines
coplanar lines that do not intersect
Paralel planes
planes that do not intersect
Parallel lines
coplanar lines that do not intersect