I tried Inkscape to vectorize a picture of a few geometrical shapes. Fiddling with paths and adjusting dimensions to match was a pain, and I gave up any hope to

I tried Inkscape to vectorize a picture of a few geometrical shapes. Fiddling with paths and adjusting dimensions to match was a pain, and I gave up any hope to have a rotated triangle measured correctly due to the sqrt(2) in it. But Inkscape offers an XML escape hatch which is actually quit cool. I could use it to build the basics, and then use typical tools to achieve symmetries and spacing.