Find the perimeter of the window round to nearest tenth and then it says 20 cm i will send picture

Question

asked Sep 10, 2023 39.0k views

1 Answer

Clearscreen · Answer 1 · 2023-09-16T15:48:26+0000

The window is half a circle. We know that the perimeter of a full circle is:

$P=\pi D$

Where D is the diameter of the circle. Since we only have half of the circle the perimeter of our window will be:

$P=(\pi D)/(2)$

We need to find the diameter of the circle, from the picture we conclude the diameter is 40 cm (since the diameter is twice the radius).

Then our perimeter is:

$P=(\pi\cdot40)/(2)=62.8$

Therefore the perimeter of the window is 62.8 cm.