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phetsims / quadrilateral

"Quadrilateral" is an educational simulation in HTML5, by PhET Interactive Simulations.
GNU General Public License v3.0
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User Recommendation: Indicator for perpendicular diagonal lines #436

Open jessegreenberg opened 1 year ago

jessegreenberg commented 1 year ago

he suggested that when diagonals are on and become perpendicular (as in the case of a kite), that they should turn red or be highlighted or something, as that is a significant feature that is used in teaching those shapes

From Scott Lambert after a conversation with a high school geometry teacher.

The teacher suggested that the diagonals turn red or be highlighted (or something) when the diagonals become perpendicular. Hey said that this is a significant feature that is used in teaching those shapes.

terracoda commented 1 year ago

Color alone is not a good way to communicate something important.

We cannot address this request for the initial publication, but I would suggest a right angle marker on the diagonal guides as a non-color-centric indication of diagonal symmetry.

In addition to a visual right-angle marker, we would need to potentially add something to the context response when diagonal guides are visible.