Question

if radius of a circle 2 cm .find perimeter​

Answer 1

Answer:

The perimeter of circle is

2πr

i.e.

=2×22/7×2

88/7

12.5714

Answer 2

Solution:-

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$\large\to{\underbrace{\underline{\sf{Understanding\:the\:concept:-}}}}$

$\mapsto$ Here it is given in the question that the the radius of a circle is 2 cm. Now the question has asked us to find out the circumference (perimeter) of the given circle. So, to find the circumference we need to apply the formula of circumference of circle that is 2πr. The result which we will get after solving by applying the formula will be the perimeter of the circle.

ANSWER:-

• Circumference is 12.57 cm.

GIVEN:-

• Radius of the circle = 2 cm

TO FIND:-

• Here we have to find the Circumference of the given circle.

SOLVING STEP BY STEP:-

• To find the circumference we have to put the values in the formula and then by solving it we will simply get the circumference.
• Value of π (pi) is = 22/7
• Here, value of r is = 2 cm

We know that:-

$\underline{ \boxed{\sf \bigstar Circumference\:of\:circle = 2\pi r}}$

Where,

• π = 22 / 7
• r = 2 cm

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• Finding the circumference:-

$\sf {Circumference = 2 \times \dfrac{22}{7} \times 2 \: cm}$

$\sf {Circumference = \dfrac{2}{1} \times \dfrac{22}{7} \times 2 \: cm}$

$\sf {Circumference =\dfrac{2 \times 22}{7} \times \dfrac{2}{1} \: cm}$

$\sf {Circumference =\dfrac{44}{7} \times \dfrac{2}{1} \: cm}$

$\sf {Circumference =\dfrac{44 \times 2 \: cm}{7}}$

$\sf {Circumference =\dfrac{88 \: cm}{7}}$

$\sf {Circumference =\dfrac{ \not{8} \not{8}\: cm}{ \not{7}}} = 12.57 \: cm$

$\overline{ \boxed{\sf Circumference = 12.57 \: cm}}$

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Abbreviations used:-

• R = Radius

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