Question

how to find the circumfrence of the circle when area is given???

Answer 1

Question :--- How to find the circumfrence of the circle when area is given ???

Formula used :---

→ Circumference of circle with radius r = 2πr.

→ Area of Circle with radius r = πr².

Solution :---

Let The circumference of a circle is = C.

we know that circumference = 2πr.

So,

→ 2πr = C

Dividing both sides by 2π , we get,

→ r = (C/2π) ----------- Equation (1)

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Now, Let Area of circle = A .

we know that Area of circle = πr².

So,

→ A = π × (r)²

Putting value of r From Equation (1) now, we get,

→ A = π × (C/2π)²

→ A = π × (C²) / 4π²

→ A = (C²) /4π .

Hence, Area of circle with Circumference will be (C)²/4π.

{ in this we can put value of Cirumference and Find Area Directly. }

Answer 2

Answer:

Step-by-step explanation:

We Have :-

Area of circle

To Find :-

Circumference of the circle

Formula used :-

Area of circle = π r²

Circumference of circle = 2 π r

Solution :-

Area is given to us

So from formula of Area we can see

We have Area , value of pi

Only one unknown is left i.e radius

So we can find Radius from that

After that we can use the radius in the formula of circumference to find the circumference