Question

John is putting a fence around his garden that is shaped like a hali circle and a rectangle.

Answer 1

The given figure is form by a semi circle and a rectangle

In the given figure, the diamter of the semi circle is 7 ft, Radius = 3.5 cm

The general expression for the perimeter of the circle is :

`\text{Perimeter of Circle=2}\Pi Radius`

then for the semi circle :

`\text{Perimeter of Semicircle=}\Pi radius`

Substitute the value of r = 3.5 cm

`\begin{gathered} \text{Perimeter of Semicircle=}\Pi radius \\ \text{Perimeter of Semicircle=3.14}*3.5 \\ \text{Perimeter of Semicircle= 10.99 ft}^2 \end{gathered}`

Now, for the rectangle

The perimeter of rectangle = 2(Length + Breadth)

In the given figure, we have Length = 14 ft and breadth = 7ft

`\begin{gathered} \text{ Perimeter of the given rectangle=2(14+7)} \\ \text{Perimeter of the given rectangle=2(21)} \\ \text{Perimeter of the given rectangle=}42\text{ ft} \end{gathered}`