Answer:
no because Pi is an irrational number you can't write it down as a non-infinite decimal. This means you need an approximate value for Pi.
#1 is 4,-2
#2 is I cnt figure out
#3 is 12,-8
<h3>
Answer: 18pi</h3>
============================================================
Explanation:
The area 81pi square meters leads to the radius 9 meters
Use the formula A = pi*r^2 to see why this is the case. You plug in A = 81pi and solve for r to get r = 9.
-----------------
Once you know the radius, you can determine the circumference C
C = 2*pi*r
C = 2*pi*9
C = 2*9*pi
C = 18pi
The circumference is the perimeter, or distance, around the circle.
What do you mean. It is equal to 224.7 and 2247/10. Add to your question and I will explain more in depth.
