Neat idea, but the interface as is feels super clunky. For example, the undo button on the first question causes my reflection controls to disappear. I'm off by half a point, but I can't quickly iterate to find the right answer. For the second one, I imagine a click and drag interface would do pretty well, where I click the origin and drag a distance equal to the dilation.<p>It's a great interactive puzzle either way. I imagine that making it more highly interactive would be a great way to help kids get better at spatial reasoning.
I found puzzles involving dialation to be quite annoying.<p>Consider this solution for the third puzzle of Transformation Puzzles 2:<p><pre><code> Reflection over the line from (1.5,-1.5) to (-1.5,1.5)
Dilation of scale 256 about (2.5,2.5)
Reflection over the line from (1.5,-1.5) to (-1.5,1.5)
Dilation of scale 1/256 about (2.5,2.5)
</code></pre>
You are unable to visibly discern a difference between the two shapes after this, but the interface refuses.