Question

Find the perimeter and area. (Plz help with this problem)

Answer 1

The first step to solving this problem is to find the area and circumference of the half circle using these equations:

`d/(1)/(2) =r`
`r*\pi=C` and
`C/(1)/(2)= a`
d= diameter
r= radius
C= circumference
a= answer

So the the "d" of the half circle is 10, and half of 10 is

`r=5` . Because we are solving for only half of the circle this is what happens:

`5*\pi =15.71`

`15.71*(1)/(2) =7.86`
Now we just add the other sides together:
`10+19+19+7.86=55.86m`
The Perimeter is 55.86

Now for the area we must use a similar equation for the half circle:
`Area=\pi r^2`

`5^2=25`
`25*\pi =78.54`

This is the area of the whole circle so we have to divide 78.54 by half to get our answer, which is 39.27


`10*19=190` This is the area of the rectangle

`190+ 39.27=229.27` Is the area of the whole shape

Perimeter= 55.86
Area= 229.27