Question

The radius of a semicircle is 3 kilometres. What is the semicircle's perimeter?

Answer 1

Answer:

In terms of Pi: $3\pi + 6$ km

Exact value (rounded): 15.42477 km

Approximated (3.14): 15.42 km

Step-by-step explanation:

Hello!

A semicircle's perimeter can be found using the formula: $P = \pi r + 2r$

We can plug in the values to solve for the perimeter.

Solve

• $P = \pi r + 2r$
• $P = \pi(3)+ 2(3)$
• $P = 3\pi + 6$

In terms of Pi, it is $3\pi + 6$,

Exact value of Pi, it is 15.42477

Approximation of Pi (3.14), it is = 15.42