Uh oh! Wolfram|Alpha doesn't run without JavaScript.
Please enable JavaScript. If you don't know how, you can find instructions
here
.
Once you've done that, refresh this page to start using Wolfram|Alpha.
x/2 = 4 - sqrt(16-(x-4)^2)
x/2 = 4 - sqrt(16-(x-4)^2)
Natural Language
Math Input
Extended Keyboard
