Difference between revisions of "KGS math club/solution 11 20"
Flyingdario (talk | contribs) (Created page with "By drawing all diagonals and looking at angles we see that the triangles formed by {c, d, d} and {c, c, d-c} are similar. Then c : d = (d-c) : c After that few calculations le...") |
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By drawing all diagonals and looking at angles we see that the triangles formed by {c, d, d} and {c, c, d-c} are similar. | By drawing all diagonals and looking at angles we see that the triangles formed by {c, d, d} and {c, c, d-c} are similar. | ||
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Then c : d = (d-c) : c | Then c : d = (d-c) : c | ||
| − | After | + | |
| + | After few calculations c : d = <math>(sqrt(5)-1)/2</math> | ||
Latest revision as of 13:24, 14 August 2012
By drawing all diagonals and looking at angles we see that the triangles formed by {c, d, d} and {c, c, d-c} are similar.
Then c : d = (d-c) : c
After few calculations c : d = 
