This document reviews basic geometric concepts including points, lines, line segments, rays, angles, and angle classification. It provides definitions, examples, and interactive elements to reinforce understanding of each topic. Citations are included at the end for additional reference materials.

1. A REVIEW OF BASIC CONCEPTS
By Kelly Boushell
Submitted June 5th, 2010
Dr. Sims
ITC 525 Computers for Educators
BEGIN

2. Table of Contents
Points Lines
Rays Line Segments Angles
“Choose one of the topics above to begin.”
“When you are ready to begin another topic
click on me at the bottom of the screen to
come back to the table of contents.”
Standards Citations

3. More info here!
POINT
A point is a location in space.
Watch movie! Capital letters are used to name points.
M A
G K
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4. LINE SEGMENT
Quiz Me!
More info here!
A line segment is made up of 2 points and
the straight path between them.
N This line segment
is called:
D ND or DN
The two points at the ends of a line
segment are called endpoints.
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5. Quiz Me!
1. What is the name of
this geometric figure?
A. Line M
B. Line Segment E
C. Ray
BACK
Table of Contents

6. Try Again
What is the name of this
geometric figure?
A. Line M
B. Line Segment E
C. Ray
Need a little help?
BACK
Table of Contents

7. Fabulous!
What is the name of this
geometric figure?
M
B. Line Segment You remembered a line
segment is made up of 2
E
points and the straight
path between them!
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8. More info here!
LINE
Quiz Me!
A line is a straight path that goes on
forever in both directions.
R and J are
points, not end
R
points!
J This line is
called:
RJ or JR
The arrowheads symbolize the line continuing forever,
even though it looks like it stops at the arrowheads.
Table of Contents

9. Quiz Me!
What is the name of this
geometric figure?
A. Line H
B. Line Segment
C. Ray
Z
BACK
Table of Contents

10. Try Again
What is the name of this
geometric figure?
A. Line H
B. Line Segment
C. Ray
Z
Need a little help?
BACK
Table of Contents

11. Superb!
What is the name of this
geometric figure?
A. Line H
You remembered a line is
a straight path that goes
on forever in both
directions!
Z
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12. More info here!
RAY
Quiz Me!
A ray is a straight path that has a starting point
and goes on forever in one direction.
This ray is called:
B WB
This is point B The endpoint is always the first
W letter in the name of a ray!
This is endpoint W
Note the difference between
point and endpoint!
Table of Contents

13. Quiz Me!
3. What is the name of
this ray?
A. OD D
B. OD
O
C. DO
BACK
Table of Contents

14. Try Again
3. What is the name of
this ray?
A. OD D
B. OD
O
C. DO
Need a little help?
BACK
Table of Contents

15. Fantastic!
3. What is the name of
this ray?
A. OD D
You remembered that the endpoint is
always the first letter in the name of a
O
ray!
Table of Contents

16. More info here!
ANGLE
An angle is formed by 2 rays or 2 line segments that
share the same endpoint.
The rays or segments
are called the sides of
The endpoint where the rays or the angle.
segments meet is called the
vertex of the angle.
NEXT
Table of Contents

17. Naming Angles
The vertex of the angle must always be
in the middle of the, between the points
A on the sides.
C This angle is called:
ABC
B The vertex point is
B. That is why B is
or
CBA
in the middle of the
sides A and C.
BACK NEXT
Table of Contents

18. More info here!
Classifying Angles
Quiz Me!
Acute Angle Right Angle Obtuse Angle
Measures between Measures exactly Measures between
0 and 90 90 90 and 180
Straight Angle Reflex Angle
Measures exactly Measures between
180 180 and 360
BACK
Watch movie! Table of Contents

19. Quiz Me!
4. What is the classification
of this angle?
A. Acute Angle
B. Reflex Angle
C. Obtuse Angle
BACK
Table of Contents

20. Try Again
4. What is the classification
of this angle?
A. Acute Angle
B. Reflex Angle
C. Obtuse Angle
Need a little help?
BACK
Table of Contents

21. Awesome!
4. What is the classification
of this angle?
You remembered that
C. Obtuse Angle an obtuse angle
measures between 90
and 180 !
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22. Citations
Bell, M. (2002). Everyday mathematics student reference book. Chicago: McGraw-Hill.
Bell, M. (2002). Everyday mathematics teacher lesson guide. Chicago: McGraw-Hill.
Eather, J. (2001). A maths dictionary for kids. Retrieved on June 3, 2010 from
http://www.amathsdictionaryforkids.com/
Pennsylvania department of education. (2009). Academic standards for mathematics. Retrieved on
June 3, 2010 from
http://www.pdesas.org/main/fileview/Academic_Standards_for_Mathematics_(Elementary).pdf
Weatherall, P. (2009). Angles music video [YouTube Video]. Retrieved on June 3, 2010 from
http://www.youtube.com/watch?v=yptZt9hwrzU&feature=related
YourTutorOnline. (2009). Points and lines [YouTube Video]. Retrieved on June 3, 2010 from
http://www.youtube.com/watch?v=AJEjpy7AmBU
Zahn, C. (n.d.) You are here' sign/ man getting squashed by an 'x‘. Retrieved on June 3, 2010 from
http://www.cartoonstock.com/lowres/cza0219l.jpg
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