1.

Find the circumference of a circle,if it's diameter is 14cm long

Answer»

Step-by-step explanation:

GIVEN:-

Diameter = 14 CM

To FIND:-

Find the circumference of the circle?

Solution:-

Method-1:-

Given that

Diameter of a circle =(d) = 14 cm

We know that

Radius = Diameter/2

=> Radius = 14/2 cm

Radius of the given circle =(R) = 7 cm

We know that

Circumference of a circle is 2πr units

On Substituting the value of r in the above formula

=> C = 2×(22/7)×7 cm

=> C = 2×22 cm

=> C = 44 cm

Circumference = 44 cm

Method -2:-

Given that

Diameter of a circle =(d) = 14 cm

We know that

Circumference of a circle is πd units

On Substituting the value of d in the above formula

=> C = (22/7)×14 cm

=> C= 22×14/7 cm

=> C = 22×2 cm

=> C = 44 cm

Circumference = 44 cm

Answer:-

Circumference of the given circle is 44 cm

Used formulae:-

  • Circumference of a circle is 2πr units

  • Circumference of a circle is πd units

  • π=22/7

  • d = diameter of a circle

  • r = radius of a circle


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