how to show square root symbol in image using gd library

Question

I'm using php and gd library to draw a triangle. I'm able to draw triangle and add text to it(using imagettftext). But now i'm stuck with a problem.

The two sides of the triangle are 'x' and 'x+2'. So hypotenuse will be sqrt(x^2+(x+2)^2). But i dont know how to show this equation using proper mathematical(i mean using square root symbol etc.) in the image using gd functions as a label to the hypotenuse.

Is there a way for doing it?

Answer 1

Don't know if the sign will work in imagettftext but here it is √. To do it (on mac) you press Alt (option) + J.