Question

Find the diameter of a circle whose circumference is 18 cm

Answer 1

Answer:

Diameter of circle = 5.72 cm

Step-by-step explanation:

According to the information provided in the question it is given as

Circumference of circle = 18 cm

We need to find the diameter of circle

First understanding the meaning of circumference

Circumference meaning · The length of such a boundary. · The line bounding a circle, a rounded surface, or an area suggesting a circle.

According to the formula of circumference

Circumference = 2$\pi r$

Putting the values we get r

    [tex]18= 2\times \frac{22}{7} \times r\\ 18= 6.28 r\\ r=\frac{18}{6.28} \\ r=2.86[/tex]

So radius = 2.86 cm

we need diameter = D = 2 x r

                                  D = 2 x2.86

                                  D = 5.72 cm

Hence diameter of circle is = 5.72 cm

Answer 2

Given,

Circumference of the circle = 18cm

Find the Diameter

Solution :

Let's solve the problem by using the formula below,

$\boxed{ \color{gold} \bold{\sf{Circumference_{(circle)} = \pi d}}}$

On substituting the values,

$\rm⇢ \: \: 18 = 3.14 \times d$

$\rm⇢ \: \: d = \frac{18}{3.14}$

$\rm⇢ \: \: d = 5.72cm$

FINAL ANSWER :-

$\color{lime} \pmb{\textbf{\textsf{Diametre \:= 5.72cm}}}$