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Basic Geometric Elements
Point
Line
Line segment
Ray
Parallel lines
Intersecting lines
Perpendicular
Angles
Vertex
Sides
Geometry
Point
An exact location in
space
Line
An endless collection
of points along a
straight path
Line segment
Part of a line that has
two endpoints
.
A
Geometry
Ray
Part of a line that
has one endpoint
and extends
endlessly in the
other direction.
.
Geometry
Parallel Lines
Lines do not intersect
but are in the same
plane
Intersecting Lines
Lines meet at one point
Perpendicular Lines
Lines form a right
angle
Angles
An angle is formed when two rays have the
same endpoint.
This endpoint is called the vertex.
The two rays that form the angle are called
sides.
Angles
There are four types of angles
Right angle
Straight angle
Acute angle
Obtuse angle
Right Angles
Forms a square corner
Forms a 90 degree
angle.
90
degrees
Straight Angle
Forms a straight line
Angle is 180 degrees
180 degrees
Acute Angles
Forms an angle that is
less than a right angle
Angle is less than 90
degrees
Obtuse Angles
Form an angle that is
more than a right
angle
Angle is more than 90
degrees