Question

Four
semicircles
are
drawn
taking
the


sides
of
a
square
of
side
14cm
as
their


diameter.
Find
the
perimeter
of
the
given shape​

Answer 1

Answer:

area of 1 semi circle is 2r+ πr

r(2+π)

7(2+3.14)

7 X 5.14

35.98 cm²

so area of 4 semi circle is 35.98 X 4= 143.92 cm²

Answer 2

Given :-

• Side of square = 14 cm.

To Find :-

• Perimeter of given shape .

Solution :-

we know that,

• Radius = Diameter / 2 .
• Perimeter of semi - circle = (1/2) * 2πr = πr .

from image as we can see that, there are 4 semi - circle taken diameter as side of square .

so,

• Radius = 14/2 = 7 cm.

then,

→ Perimeter of 1 semi - circle = (22/7) * 7 = 22 cm.

therefore,

→ Perimeter of 4 semi - circles = 22 * 4 = 88 cm. (Ans.)

Hence, Perimeter of given shape is 88 cm.

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