Question

math formula of circle

Answer 1

Hey there !!!

Circumference of circle =
$2\pi \: r$
Area of circle =
$\pi \: {r}^{2}$

Answer 2

Answer:

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Formula of circle

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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 ×

${r}^{2}$

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• r denotes the radius of the circle.
• d indicates the diameter of the circle.
• c indicates circumference of the circle.

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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