I appologise if this is the wrong forum. I figured triangles are trigonometry.

Are there any equilateral triangles where both h and a are integers?

I found this formula on the internet.

h= (1/2) * √3 * a

Is there any way to re-arrange it to get rid of the square root?

I'm trying to write a program to answer my original question but it would round off a value for the square root which would make it impossible to find a match. Sorry if this is really basic, I left school a long time ago.