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.
solve for x4, (y1-y2)/(x1-x2)*(x4-x1)+y1 = tan(atan((y1-y2)/(x1-x2))+90)*(x4-x3)+y3
solve for x4, (y1-y2)/(x1-x2)*(x4-x1)+y1 = tan(atan((y1-y2)/(x1-x2))+90)*(x4-x3)+y3
Natural Language
Math Input
