When you create a diagram in Math Illustrations you get all the symbols without any effort! When you constrain or annotate a line, the length symbols is added automatically. This is true for any annotation or constraint that you add!
The following is a demonstration of how easy it is to create a triangle and label its sides. As an added bonus the video also shows how easy it is to paste your figure into Word!
When you draw with constraints you don't have to worry about lining up shapes so they appear to have a certain relationship. If you want a line tangent to a circle, simply constrain it to be. You are then free to move or resize your circle and the line will automatically remain tangent to the circle!
When you want to label an angle, length, etc without constraining its value use can use annotations. An annotation label can be anything you want -- including a mix of text and 2D math.
The following is a simple demonstation of using constraints and annotations:
