for arbitrary quadrangle, if we know four side and one diagonal, can we know another diagonal? how?
Mar 12, 2008 #1 enricfemi 191 0 Main Question or Discussion Point for arbitrary quadrangle, if we know four side and one diagonal, can we know another diagonal? how?
Main Question or Discussion Point for arbitrary quadrangle, if we know four side and one diagonal, can we know another diagonal? how?
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Related General Math News on Phys.org Mathematician develops model to control spread of aquatic invasive species Best of the best: Who makes the most accurate decisions in expert groups? New statistical model improves the predictive power of standardized test scores
Mar 12, 2008 #2 tiny-tim Science Advisor Homework Helper 25,789 249 Hi! Do you know the formulas for sides-and-angles of a triangle? If so, you have two triangles, ACB and ACD, say, so you can find all the angles. In particular, you can find angles CAB and CAD. Add them to get angle DAB. Now you have a triangle DAB of which you know two sides and the angle in between.
Hi! Do you know the formulas for sides-and-angles of a triangle? If so, you have two triangles, ACB and ACD, say, so you can find all the angles. In particular, you can find angles CAB and CAD. Add them to get angle DAB. Now you have a triangle DAB of which you know two sides and the angle in between.
Mar 12, 2008 #3 enricfemi 191 0 though i found it almost impossible to find out the expression,it seems to be the only way to solve such complicated problem. THX:rofl:
though i found it almost impossible to find out the expression,it seems to be the only way to solve such complicated problem. THX:rofl: