Question

If the diameter in the semicircle is 10.5 what is the perimeter

Answer 1

Perimeter of semi-circle = 16.5 cm.

Explanation:

Given that,

Diameter of the semi-circle,
`\text{d} = 10.5 \ \text{cm}`

So, Radius of the semi-circle,
`\text{r} = 10.5/2 \ \text{cm}`

We know that,

Perimeter of a Circle
`= 2\pi r`

So, Perimeter of a semi-circle
`= (1)/(2) * 2\pi r`

`= \pi r`

`= (22)/(7) * 10.5/2`

`= 16.5 \ \text{cm}`

Hence, Perimeter of the semi-circle with diameter 10.5 cm is 16.5 cm.