Question

find the area of circle having radius 7 cm

Answer 1

$\maltese\LARGE\textsf{\underline{ GiVeN :-}}$

$\large\textsf{ }$

$\qquad\tt{:}\longrightarrow\large\textsf{Radius of the circle ( r ) = 7cm}$

$\large\textsf{ }$

$\maltese\LARGE\textsf{\underline{ To FiNd :-}}$

$\large\textsf{ }$

$\qquad\tt{:}\longrightarrow\large\textsf{Area of the circle = ?}$

$\large\textsf{ }$

$\maltese\LARGE\textsf{\underline{ FoRmUla :-}}$

$\large\textsf{ }$

$\qquad\tt{:}\longrightarrow\boxed{\large\textsf\color{purple}{ {\large\textsf{Area}}_{\large\textsf{( \; Circle \; )}} = \large\sf{\pi r^2} }}$

$\large\textsf{ }$

$\maltese\LARGE\textsf{\underline{ SoLuTioN :-}}$

$\large\textsf{ }$

$\qquad\tt{:}\longrightarrow \sf \large\: Area \: \: \: of \: \: \: the \: \: \: circle \: \: \: = \: \: \: \pi {r}^{2} \\ \\ \\ \qquad\tt{:}\longrightarrow\sf \large= \: \: \: \cfrac{22}{ \cancel7} \: \: \: \times \: \: \: \cancel7 \: \: \: \times \: \: \: 7 \\ \\ \\ \qquad\tt{:}\longrightarrow \sf\large= \: \: \: 22 \: \: \: \times \: \: \: 7 \\ \\ \\ \qquad\tt{:}\longrightarrow\boxed{ \sf\large \color{red}= \: \: \: 154 \: \: \: {cm}^{2} }$

Answer 2

Answer:

Hence, area of the circle having radius 7 cm will be 154 sq. cm

Step-by-step explanation:

In context to question asked,

We have to determine the area of the circle.

As per question,

We have,

Radius of circle = 7 cm

As we know that,

Radius of circle is the straight line which are drawn from the centre of circle to the circumference of the circle.

As we know that,

Area of circle $=\Pi r^2$

So, for determining the area of circle, we will put the value of radius of circle in above formula,

Thus we will get,

$Area = \Pi r^2\\=>Area = \frac{22}{7} \times 7 \times 7\\=>22 \times 7\\=>154\:cm^2$