"What is the area? You should be able to solve this"

[Gerson W. Barbosa]

(08-07-2018 12:57 AM)Albert Chan Wrote:  Ideally, cm^2 should be left out, and put back at the end.

As a former Physics student (eons ago, for one and a half year), I usually don’t leave them out either. But I did this time as there was no way to make a mistake on this one.

For some reason (perhaps a forgotten knowledge) I had a hunch the sums of the areas of opposite regions would equal each other. I tried two or three examples in scale and it proved right. Hopefully my graphical proof us valid and clear, despite mistakes like S1’ + S2” instead of S1’ + S2’.

Once I had a hard time trying to impose my point without a proper proof, so I’ve been avoiding participating in these kind of discussions, but I thought this problem was worth being presented here. I’m glad you and others have liked it.

Gerson.