I just got an idea, but I don't think I know enough to make it work. One solution (I think) is to create a triangle connecting the center of the circle with the two points where the x-axis intersects the circle. That angle forms both a wedge of the circle and a triangle; subtract the triangle...
There is a problem I'm doing that I understand except for one part. There is a cylinder lying flat, and I want to measure the percentage of fluid in the cylinder by lowering a dipstick inside. In order to do this, I need to find out the height of the fluid when the cylinder is 10% full, 20%...
There is a circle with a radius of 5 bisected by the y-axis. If we move it up and down the y-axis, different percentages of the circle will be above and below the x-axis. What I need to find out is how to relate the percentage below/above the x-axis (either would work) to the distance between...