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:
$d/\frac{1}{2} =r$ $r*\pi=C$ and $C/\frac{1}{2}= a$
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:
$5*\pi =15.71$
$15.71*\frac{1}{2} =7.86$
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