Formulaes of circles and system of circles
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here some formula of circles
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Answer:
The Circle Formulas are expressed as,
Diameter of a Circle D = 2 × r
Circumference of a Circle C = 2 × π × r
Area of a Circle A = π ×
Where,
r denotes the radius of the circle.
d indicates the diameter of the circle.
c indicates circumference of the circle.
SOME EXAMPLES
Example 1
A circle has a radius 8 cm. Calculate its diameter, area and circumference.
Solution
Given parameters are,
Radius, r = 8cm
Diameter of a circle is given by
2r
= 2 × 8 cm
= 16 cm
Area of a circle is given by
π r2
= π × 64
= 201.088 cm2
Circumference of a circle is given by
2 π r
= 2 × π × 8
= 50.272 cm
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