How to do this question plz. plz work out for me in your notebook or sheet if you can plz the question so I can understand more plzz

Question

asked Apr 28, 2021 153k views

1 Answer

Tony Vitabile · Answer 1 · 2021-05-05T12:20:24+0000

Answer:

$3\pi$

Explanation:

The circumference of a circle is
$2\pi r$ .

If we want to find the circumference of this semi-circle, we can find the circumference if it was a whole circle then divide by 2.

$2 \cdot \pi \cdot r\\2 \cdot \pi \cdot 3\\6 \cdot \pi\\ 6\pi$

Now we know the circumference of the whole circle.

To find the circumference of half the circle we divide by 2.

$6\pi / 2 = 3\pi$

Hope this helped!