The epxression pie2 gives the area of a circle with the radius r. How many square meters of wheat were destryoed when an alian ship made a crop circle of diameter 25 meters in the wheat field at the southwind Ranch? find pie on the calculater?
The epxression pie2 gives the area of a circle with the radius r. How many square meters of wheat were destryoed when an alian ship made a crop circle of diameter 25 meters in the wheat field at the southwind Ranch? find pie on the calculater?
By the way, it's "pi" not "pie."
If the diameter d = 25 m, then the radius is $\displaystyle r = \frac{d}{2} = \frac{25 \, m}{2} = 12.5 \, m$. So the area of the circle is:
$\displaystyle A = \pi r^2 = \pi (12.5 \, m)^2 = 490.874 \, m^2$.
You will find "pi" on your calculator by looking for the symbol "$\displaystyle \pi$".
-Dan