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Thu 23 Jun, 2005 06:41 pm
quadrilateral ABCD,ABD=50,DBC=30,ACB=40,ACD=30,CAD=??
THANKS FOR ANSWERING
I'll assume all these are angles, except fopr the quadralateral?
Rap
20
I could easily calculate all angles in the quad (with diagonals) except for two (CAD and ADB). Used law of sines and law of cosines to get the last two.
thank you
but is there any other ways to do it?
By construction I came up with 20. I think Ptolemy would be proud.
Rap
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