Question

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

Answer 1

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

Answer 2

Given:-

• Diameter of Circle = 14 cm.

To Find:-

• Circumference of Circle

Formula used:-

• Circumference of Circle = 2πr

Solution:-

Diameter = $14 \:cm$

Radius = $\dfrac{Diameter}{2}$

Radius = $\dfrac{14}{2}$

Radius = $7 \:cm$

Now, let's find out the Circumference,

⟾ Circumference of Circle = 2πr

⟾ Circum. of Circle = $2×\dfrac{22}{7}×7$ cm

⟾ Circum. of Circle = 2 × 22

⟾ Circum. of Circle = 44 cm

Hence, the Circumference of Circle is 44 cm.

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