CLASSROOM RULES
1. Respect each other.
2. Raise your hand if you have something
to say.
3. Listen when someone is talking.
4. Participate in the class.

Questions:
1.How many sides are
there in the figure?
2. Is this a polygon?
3. What do you think
this figure called?

CIRCLE

OBJECTIVES
At the end of the lesson, the students are expected to
get 75% proficiency of the following:
a. Illustrate a circle and the terms related to it: radius,
diameter chord, center, arc, chord, central angle, and
inscribed angle.
b. Appreciate the importance of a circle and develop
cooperation within the group, and
c. Draw parts of the circles and solve a problem on circle

DEFINITION OF A CIRCLE
Note: A circle is named by its center.
Circle is the set of all points that
are the same distance from a
fixed point.

PARTS OF A CIRCLE
1. CENTER- The given point from which all
points on a circle are the same distance.
2. CIRCUMFERENCE- The distance around
the edge of a circle.
3. RADIUS- Distance from the center to any
point of circumference.

PARTS OF A CIRCLE
5. CHORD- A line segment whose endpoints
are on the circle.
4. DIAMETER- It is chord that passes through the
center of a circle. It is the longest chord of a circle and it
is twice the length of the radius of a circle.
6. SECANT- A line that intersects the circle in
two different points.

PARTS OF A CIRCLE
7. TANGENT- A line which touches a circle at
just one point.
8. ARC- It is a portion of the circumference of
a circle.
9. SECTOR- A circular sector or circle sector (symbol:
⌔), is the portion of a disk enclosed by two radii and an
arc.

PARTS OF A CIRCLE
10. SEGMENT- The segment of a circle is the
region bounded by a chord and the arc.
11. CENTRAL ANGLE- It is an angle that forms
when two radii meet at the center of a circle
12. INSCRIBED ANGLE- It is an angle formed by
two chords in a circle which have a common endpoint

NAME THE PARTS OF THE
CIRCLE
GENERALIZATIONS
P
M
O
R
D
U
X
Y
S

APPLICATION
r=6cm
r=12cm d=30cm
d=24cm r=15cm
d=12cm

GENERALIZATIONS

VALUES
INTEGRATION

ACTIVITY

1. Name each radius.
2. Name each chord.
3. Name each tangent.
4. Name each diameter.
5. Name each secant.
• O
A
B
C
D
F
E
y
x

B. Direction: Draw your own circle and
illustrate the following:
1. Center A
2. Chord QR
3. Diameter DE
4. Radius AC
5. Tangent OB

ASSIGNMENT:
Study and Research
measures of Central tendency.

THANK YOU FOR
LISTENING!
GOD BLESS! 