fifteen minutes of fame to DJBruce, HUZZAH, HUZZAH.. I am not here interested in the trigonometric stuff because I consider that derivative, later, understanding. I use similarity of triangles, as well as area of any triangle. First we see this as 1/2 ab, but then with the construction, it is also 1/2 c h. Further sober inspection tomorrow will hoppfuly confirm my inspcetions, and our h's.
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Consecutive posts mergedWow, it seems you use only the principles of similar triangles, and not the areas like I did. Good one.
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Consecutive posts mergedDJBruce achieved a tighter solution than I did, so I think he deserves two FIFTEEN MINUTESES OF FAME.One does not need to appeal to the triangle area formula, if you write the two similarity relations as he does. Congrats! . . To hell with my paperette. Cheers!