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Grade 5 - Mathematics
7.17 Circle Facts
Circle is the set of all points in a plane at a fixed distance, called the
, from a given point, the
A circle can be drawn with the help of a
A line from the center to any point on the circle is called
The distance across a circle through its center is called its
Diameter is twice the radius.
A line segment joining two points on a circle shown in the figure is called a
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
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
Answer the following questions. Also draw a circle of radius 3 cm and show its center, radius, diameter.
: The formula for circumference of a circle with diameter d is =
c = pi x pi
c = pi x d
c = pi x r
: The radius of a circle is _______________.
twice the diameter
half of the diameter
equal to the diameter
: In the formula for finding circumference of a circle C = Pi x d. What is the value of the constant Pi
: 1/2 of a diameter of a circle is the
: A line segment DC joining two points on a circle shown in the figure is called a ______
: The line which divides a circle in half is called the
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