2. Geometry
Point
An exact location in
space
Line
.A
An endless collection
of points along a
straight path
Line segment
Part of a line that has
two endpoints
3. Geometry
Ray
Part of a line that has
one endpoint and
extends endlessly in
the other direction
Plane
An endless, flat surface .C
.B
that is named by any .A
three points not on the
same line.
4. 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
5. 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.
6. Angles
There are four types of angles
Right angle
Straight angle
Acute angle
Obtuse angle
7. 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
8. Straight Angle
Forms a straight line
Angle is 180 degrees
180 degrees
Use the edge of your
index card to make
sure you have a
straight angle.
9. Acute Angles
Forms an angle that is
less than a right angle
Angle is less than 90
degrees
10. Obtuse Angles
Form an angle that is
more than a right
angle
Angle is more than 90
degrees
11. Review
Name each picture
Ray 1.
2.
Parallel lines
3.
Line
12. Review
Name each picture
Acute angle
4.
5.
Line segment
6.
Point
13. Review
Name each picture
Intersecting lines
Perpendicular and
Intersecting lines
Plane
