These are the screens that were used to remind students of the altitude of a 30-60-90 triangle with hypotenuse 1. Although in words I had to call it "height" or "altitude," in the drawing I only indicated a question mark.
These are the screens in which I presented the drawing. In both classes I had the same wrong answer that simply doubled the diagonal in the first figure. This shows how I drew auxiliary lines that convinced the students that wasn't correct. In the second screen I had asked the class what they notice about the figures before I posed the problem. The notes are things the students called out.
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