Question

Area of Circle Aim To get the area of circle geometrically. You will Require : Coloured paper, glue sticks. Steps : 1. Cut a cut out of circle from paper. 2. Divide it into parts. 3. Arrange the parts to be a parallelogram. 4. Find the area of circle. 24 13 NA. VAAAAAAAA 12 Record the Activity: Area of parallelogram or rectangle Area of parallelogram = hxb 1 = -x cr 2 zxc 1 x 2pr xr 2 =pr2 Area of circle pr
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Answer 1

The area of a circle is the space occupied by the circle in a two-dimensional plane. Alternatively, the space occupied within the boundary/circumference of a circle is called the area of the circle. The formula for the area of a circle is A = πr2, where r is the radius of the circle. The unit of area is the square unit, for example, m2, cm2, in2, etc. Area of Circle = πr2 or πd2/4 in square units, where (Pi) π = 22/7 or 3.14. Pi (π) is the ratio of circumference to diameter of any circle. It is a special mathematical constant.

Answer 2

Answer:

Aim : To find the area of a circle of given radius by paper folding,cutting and pasting.

Material Required

1 ) Coloured Paper

2 ) Pair of scissors

3 ) Fevistick/glue

4 ) Geometry Box

Method : We can find that area of circle by following these steps :

Step 1 Cut a circle of given radius from the coloured paper.

Step 2 Divide the circle into 16 equal parts by paper folding.

Step 3 Cut 16 parts and arrange them to form a parallelogram.

Step 4 Take the last cutout and again divide it into 2 equal parts.

Step 5 Arrange the 2 parts and the shape in step 3 so that a rectangle is formed.

Step 6 Measure the length & breadth of the rectangle & calculate its area.

And the area of the rectangle is equal to the area of circle cutout at first .

Refer to the attachments also

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