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Golden angle

In geometry, the golden angle is the angle created by dividing the circumference c of a circle into a section a and a smaller section b such that

<math>c=a+b<math>

and

<math>\frac{c}{a}=\frac{a}{b}<math>

and taking the angle of arc subtended by the length of circumference equal to b as the golden angle. There are φ² golden angles in a circle. This is about 137.5 degrees.

See also: golden section.