Question

Find the perimeter of this semi-circle with diameter, d = 46cm,

Give your answer as an expression in terms of
d cm
The diagram is not drawn to scale.

Answer 1

`(\pi d)/(2) +d`

Explanation:

Circumference of circle =
`\pi d`

Therefore,

Curved side of semi-circle=
`\pi d / 2`

Perimeter of semi-circle= Curved side + diameter (straight side)

=
`(\pi d)/(2) +d`