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MEAP Preparation - Grade 6 Mathematics
4.24 Circle Facts
Circle is the set of all points in a plane at a fixed distance, called the
radius
, from a given point, the
centre
.
A circle can be drawn with the help of a
compass
.
A line from the center to any point on the circle is called
radius
.
The distance across a circle through its center is called its
diameter
.
Diameter is twice the radius.
A line segment joining two points on a circle shown in the figure is called a
chord
.
DC is the chord
SC is the diameter
PC is the radius
P is the center
Diameter is the biggest chord and divides the circle into exactly two halves.
The circumference of a circle is the perimeter of the circle.
The distance around a circle is called its
circumference
.
The formula to find the circumference of the circle is C = Pi x 2 x r
The area of the circle is A = Pi x r
2
Directions:
Answer the following questions. Also draw a circle of radius 3 cm and show its center, radius, diameter.
Q 1
: A line segment DC joining two points on a circle shown in the figure is called a ______
radius
diameter
chord
Q 2
: The formula for circumference of a circle with diameter d is =
c = pi x r
c = pi x d
c = pi x pi
Q 3
: The circumference of a circle C = Pi x d can also be written as
C = 2 x r
C = Pi x r
C = Pi x 2 x r
Q 4
: In the formula for finding circumference of a circle C = Pi x d. What is the value of the constant Pi
3.14
3.00
3.17
Q 5
: The radius of a circle is _______________.
twice the diameter
equal to the diameter
half of the diameter
Q 6
: Diameter of a circle is a chord that passes through the ________
center of the circle
radius of the circle
point on the circle
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Question 8: This question is available to subscribers only!
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