Geometry Stumper
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08-15-2018, 07:57 PM
Post: #14
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RE: Geometry Stumper
(08-15-2018 01:16 PM)Voldemar Wrote:(08-15-2018 12:29 PM)Albert Chan Wrote: BTW, have you peek at Thomas Puettmann sketch, about the green lines ?There are 4 angles at C. Two angles x and two angles y. this is enough to prove the whole thing ! the other side will have two angle y and two angle z, y + z = 90 --> angle DCE = x + y + y + z = (x+y) + (y+z) = 90 + 90 = 180 Wow, the power of geometry. |
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