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.
plane through (0,-1,0) and (0,1,0) and (sqr2/2,0,(2sqr3-sqr6)/2)
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random