This tutorial gives you practice finding geometric probability. Given a circle inscribed in a square, you'll see how to find the probability that a point chosen at random will land in the circle!
If you know the radius of a circle, you can use it to find the area of that circle. Just plug that value into the formula for the area of a circle and solve. Watch this tutorial to see how it's done!
Did you know that you can figure out the formula for the area of a circle by first turning the circle into a parallelogram? It seems a little weird, but it really works! Watch this tutorial to see how it's done!