This scale is LOCKED so please ZOOM IN and move the chart anywhere. This may look like a mess but these angles were anchored on points with precision. Zooming in will clear the clutter.
This whole chart is full of these relations. All 3 angles will be the same degree or within 1 degree. There are also relations with reflections from 1 center and reflections where reflections cross but the angles start from 2 different centers. Pretty phenomenal stuff here. See if you can discover any more ideas with this and let me know. I hid some objects in the object tree because the chart was getting too busy. Just click on the upper right arrow of the chart and "make it mine" to keep it and work on it yourself. The scale will have to be checked. There is a circle with 2 arrows (arrow tool). the vertical should touch the top of the circle for the scale to be right
This whole chart is full of these relations. All 3 angles will be the same degree or within 1 degree. There are also relations with reflections from 1 center and reflections where reflections cross but the angles start from 2 different centers. Pretty phenomenal stuff here. See if you can discover any more ideas with this and let me know. I hid some objects in the object tree because the chart was getting too busy. Just click on the upper right arrow of the chart and "make it mine" to keep it and work on it yourself. The scale will have to be checked. There is a circle with 2 arrows (arrow tool). the vertical should touch the top of the circle for the scale to be right