powerpoint presentation

1. BASIC CONCEPT
AND TERMS IN
GEOMETRY

2. 1. NILE
2. TOPIN
3. NAPLE

3. LEARNING OBJECTIVE
At the end of the lesson, the students are
expected to:
•Define point, line and plane; and
•Represent point, line and plane using
concrete and pictorial models.

4. UNDEFINED TERMS
IN GEOMETRY

5. GEOMETRY
comes from two Greek words: geo, meaning
“earth” and metri, meaning “measurement”,
thus the word geometry means “earth
measurement”.
branch of mathematics which deals with the
sizes, shapes, positions and properties of all
things around us.

6. UNDEFINED TERMS IN GEOMETRY
There are three terms in geometry which we
refer to as undefined terms:
• point
• line
• plane
We classify these as undefined terms because
the definitions of these terms are not precise.
However, we can use concrete objects around us
to represent these ideas.

7. POINT
 Represented by a dot (•)
 Has no dimension or actual size
 A point is usually named by a capital letter.
•A Read as Point A
•B Read as Point B
•W Read as Point W

8. POINT
PICTORIAL MODELS
Tip of a pen Tip of a needle Button

9. LINE
 Represented by a straight mark with two arrow heads
 Has no thickness, but its length extends infinitely to both
directions
 A line is named by a single lowercase script letter, or by
any two (or more) points which lie on the line.
• •
J D
m
Name: JD or DJ or m Read as: line JD, line DJ, and line m

10. LINE
PICTORIAL MODELS
Louvers of a
Window
Ballpen
Line Guides on
Intermediate Papers

11. PLANE
Has infinite length and width but has no thickness.
It is a flat surface.
A plane is named by a single script letter or by three
points in the plane that are not on the same line.
• X
•
• Y
Z
A
Read as: plane A or plane XYZ

12. PLANE
PICTORIAL MODELS
Cover of a Book
Flat-Panel Television
Screen
Blackboard

13. Identify whether the object is a representation of a
point, line, or plane.
1.Ruler
2. Tip of a Pencil

14. 3. Handkerchief 4. Hair Strand

15. 5. Cellphone Screen

16. DIRECTION: Illustrate each of the following
and label the diagram.
1. point B lies in plane M
2. line CD
3. point W
4. point F
5. line AT

17. ASSIGNMENT
For your assignment, kindly
read and study in advance the
subsets of lines.

18. THANK YOU
FOR
LISTENING!