Question

If the radius of a circle is 4cm, then find it's circumference.​

Answer 1

Taking the value of π = 3.14

Circumference of a circle (C) = 25.12 cm

Taking the value of π = 22/7

Circumference of a circle (C) = 25.1428572 cm

Step-by-step explanation:

GIVEN

Radius of a circle = 4 cm

π = 3.14 or 22/7

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To Find

Circumference of a circle

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Formulas Of Circle

Diameter of a circle (D) = 2 × radius (R)

Circumference of a circle (C) = 2 × π × r

Area of a Circle (A) = π × r²

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We know that,

Circumference of a circle (C) = 2 × π × r

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Taking the value of π = 3.14

Circumference of a circle (C) = 2 × π × r

Circumference of a circle (C) = 2 × 3.14 × 4

Circumference of a circle (C) = 6.28 × 4

Circumference of a circle (C) = 25.12

Circumference of a circle (C) = 25.12 cm

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Taking the value of π = 22/7

Circumference of a circle (C) = 2 × π × r

Circumference of a circle (C) = 2 × 22/7 × 4

Circumference of a circle (C) = 6.28571429 × 4

Circumference of a circle (C) = 25.1428572

Circumference of a circle (C) = 25.1428572 cm