+0

+1
179
4
+27

please work out perimeter.  thank you

Feb 15, 2020

#1
+9681
+2

please work out perimeter

Hi newsier!

$$P=(d\cdot \pi)/2 +d=(10\cdot 3.142)/2+10$$

$$P=25.71$$

!

Feb 15, 2020
edited by asinus  Feb 15, 2020
#2
+818
0

You can do it; it's easy.

Feb 15, 2020
#4
+595
+1

It's not easy if you don't know how to do it.

AnimalMaster  Feb 16, 2020
#3
+595
+1

Dunno if this is correct:

We know the perimeter of a circle (or circumference) is $$2\pi R$$. So that means if we want to find the area of a semi-circle, we have to divide the perimeter by 2:

Radius (R) = 5.

So it's 2 * 3.142 * 5 = 31.42.

We have to divide this by 2 so we can get our final answer:

31.42 / 2 = 15.71.

Ahh I noticed why mine was incorrect, I only did the curvy side and forgot about the bottom:

15.71 + 10 = 25.71

Feb 15, 2020
edited by AnimalMaster  Feb 15, 2020
edited by AnimalMaster  Feb 15, 2020