Question

find the circumference of a serving dish in the shape of a semi circle of radius 14cm​

Answer 1

Answer:

44cm^2

Explanation:

ANSWER IN ATTACHMENT

Answer 2

Answer :

Given :

Radius = 14 cm

Required to find :

1. Circumference of the semi circular dish

Solution :

In the question it is given that radius of the semi circle is 14 cm .

And he asked us to find the circumference of it.

As we know that

When we draw a diameter in a circle it divides the circle into 2 equal semi-circles.

Hence , from the above statement we can know that

Perimeter of the semi-circle = 1/2 x perimeter of the circle

This is mathematically represented as

perimeter of the semi-circle = 2πr/2

= πr

Hence, using the above mentioned formula we can find the circumference of the semi-circle .

But let's try this with 2 different pi value .

Let's consider the π value = 22/7

Hence,

Circumference of the semi-circle = 22/7 x 14

=> 22 x 2

=>. 44 cm .

However,

Let's now consider the value of π be 3.14

Hence,

Circumference of the semi-circle = 3.14 x 14

===> 43.96 cm

==> 44 cm ( approximately )

Conclusion :

The circumference of the semi-circle is 44 cm .

( you can use any of the given pi(π) value ).

( Tip : Mostly use the 3.14 as the pi value except in some cases )