Posted by Frank on .
If theres a golden rectangle, with one dimension shown as being 100, then what is the length of the unknown side? How do you do this please?

Math 
Reiny,
the golden ratio is (1+√5) : 2
so if 100 is the width, let the length be x
x/100 = (1+√5)/2
2x = 100 + 100√5
x = 50 + 50√5 or appr. 161.80
(The golden ratio is 1.618034 appr.
notice that our answer is 100 times that value)