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.
triangle(-1,1)(5,7/2)(0,141/20)
triangle(-1,1)(5,7/2)(0,141/20)
Natural Language
Math Input
Extended Keyboard
