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Geometry
 Point
 Line
 Line segment
 Ray
 Plane
 Parallel lines
 Intersecting lines
 Angles
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
Plane
An endless, flat surface
that is named by any
three points not on the
same line.
.B
.C
.A
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 three types of angles
 Right angle
 Acute angle
 Obtuse angle
Right Angles
 Forms a square corner
 Forms a 90 degree
angle.
90
degrees
 Use a corner of your
index card to make
sure you a have a right
angle
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
Review
Name each picture
1.
 Ray
2.
 Parallel lines
 Line
3.
Review
Name each picture
4.
 Acute angle
5.
 Line segment
6.
 Point
Review
Name each picture
 Intersecting lines
 Perpendicular and
Intersecting lines
 Plane