ACTIVITY 1
I HAVE SIX SIDES. I HAVE
SIX ANGLES. MY SIDES ARE
ALL THE SAME LENGTH.
I LOOK LIKE A SODA CAN. I
AM ROUND.
IT HAS THREE STRAIGHT
SIDES, THREE ANGLES,
AND THREE VERTICES.
IT HAS FOUR SIDES, FOUR
EQUAL ANGLES EACH
MEASURING 90°. IT HAS
FOUR VERTICES.
IT HAS TWO PAIRS OF
PARALLEL SIDES. THE
OPPOSITE SIDES OF THE
RECTANGLE ARE EQUAL IN
LENGTH. THE OPPOSITE
ANGLES ARE OF EQUAL
MEASURE.
IT IS MADE UP OF A CURVED
LINE. IT HAS NO CORNERS OR
EDGES. IT IS THE SET OF ALL
THOSE POINTS IN
A PLANE WHOSE DISTANCE
FROM A FIXED POINT REMAINS
CONSTANT.
CIRCLE AND IT’S
PARTS
Teacher Hannah
Circle and It’s Parts
WHAT IS A CIRCLE?
 a circle is the set of all
points in a plane that are
the same distance from a
fixed point called the
A few things around us that are
circular in shape are a car tire, a
wall clock that tells time, and a
lollipop.
THANK YOU
THANK YOU
Center of a Circle
The center of a circle is the center point in a circle
from which all the distances to the points on the
circle are equal. This distance is called the radius of
the circle.
Here, point P is the center of the circle.
Parts of a Circle
RADIUS
A RADIUS IS A LINE SEGMENT WITH ONE ENDPOINT AT THE CENTER
OF THE CIRCLE AND THE OTHER ENDPOINT ON THE CIRCLE.
Parts of a Circle
DIAMETER
A line segment passing through the center of a circle, and
having its endpoints on the circle, is called the diameter of
the circle.
Parts of a Circle
CIRCUMFERENCE
The circumference of a circle is the
distance around a circle. It is the
same as the perimeter of other
Evaluation
Direction: Match each term with the correct definition.
1. Radius
2. Diameter
Directions: Construct a circle with the
following conditions.
3. radius is 10 cm
4. with center O
5. with diameter PQ
Assignment
DIRECTION
DRAW AND LABEL 5 THINGS FOUND IN YOUR
HOME THAT HAS A SHAPE OF A CIRCLE.