Drawing a triangle
CounterGo is intended to draw mostly rectangular shapes, but it's also possible to make a very limited triangular shapes. Currently, you can only create right, isosceles triangles in CounterGo. Here's how:
First, in Step 1 Counter Dimensions, draw a square.
Now go to Step 2 Curves & Bumpouts. Click on one of the corners and add a clipped corner. You can experiment with the size of the clip to make it look right, or you can use Pythagoras's Theorem to get the right length to make a triangle.