ATH
Q3
in
GEOMETRY
OBJECTIVES
• Represents point, line, and
plane using concrete and
pictorial models.
OBJECTIVES
 Name a point, line,
and plane.
OBJECTIVES
 Identify
the
given
model if it is a point,
line, and plane.
OBJECTIVES
 Create concrete
examples of points,
lines, and planes.
1) Do not answer in
chorus.
2) Pay attention.
ATH
Group the given
pictures
according to its
representation:
a point, a line, or
a plane.
Stars in the sky
Stars in the sky
(POINT)
Curtain rod
Curtain rod
(LINE)
Edge of a ruler
Edge of a ruler
(LINE)
Cartolina
Cartolina
(PLANE)
A knot on a
piece of thread
A knot on a
piece of thread
(POINT)
a clothesline
a clothesline
(LINE)
top of a box
top of a box
(PLANE)
page of a book
page of a book
(PLANE)
a magic wand
a magic wand
(LINE)
button
button
(POINT)
mole
mole
(POINT)
Handkerchief
Handkerchief
(PLANE)
Q3
in
GEOMETRY
POINT
A point is an exact
position or location on
a plane surface. It has
no length, width, or
thickness.
Definition
POINT
Also, all of the figures
in geometry are made
up of points.
Definition
POINT
Dot
•
Illustration
POINT
In naming a point,
we use capital letters
•A
Read as: Point A
How to name
LINE
A line has no width and
thickness, but it has infinite
length
because
a
line
consists of infinitely many
points.
Definition
LINE
Straight mark and has two
arrow heads on opposite
ends. The arrow heads
indicate that it can be
extended indefinitely.
Illustration
LINE
In naming a line, we use two
capital letters with a double
arrowhead above them or a
lower-case letter.
How to name
LINE
How to name
PLANE
A plane is a flat surface
that extends infinitely in all
directions. It has infinite
length and width but has
no thickness.
Definition
PLANE
A plane is named by
three points in the
plane that are not on
the same line.
Definition
Slanted four-sided figure
PLANE
Illustration
PLANE
A plane can be named
using
three
capital
letters formed by three
noncollinear points.
How to name
PLANE
How to name
OTHER BASIC
GEOMETRIC TERMS
ON POINTS AND
LINES
GROUP ACTIVITY:
ANSWER:
ANSWER:
ANSWER:
ANSWER:
ANSWER:
SUM IT UP!
What have you learned
today?
How can you identify the
“undefined terms” in
Geometry?
When can we apply the
concepts of the “undefined
terms” in geometry in our
daily lives? Cite example.
ASSESSMENT
Direction: Identify the idea (a point, a line, a
plane) represented by each phrase. Copy and
write your answer in the space provided.
1. curtain rod
_____________
2. a mole
_____________
3. cable wire
_____________
4. top of a box
5. corner of a board
_____________
_____________
ASSESSMENT
ASSESSMENT
Roam around your house and look
for objects that represent a point, a
line, or a plane.
For each column, list at least 3
objects not mentioned earlier in the
discussion and draw the object.