Pentagon Angle Review
the Internet has phi geometry-related patterns that are not explained. I present here a pattern for which has a reasonable explanation later.
*Phi = Golden Ratio = 1.618
0.63 - 1.0 - 1.03 - 1.06 - 1.12 - 1.25 - 1.618 - 2.00 - 2.618
1. 2. 3. 4. 5.
36° 0.628 rad
2 x pi rad = 6.28 rad
100 mm 1.00
(108° 1.08 = 1.12 /1.0328)
307.8 / 261.8 = 1.176 1.12
72° 1.25 rad
2 x pi rad / 5 = 1.25
161.8 mm 1.618
1.25 x 1.25 x 1.03(28) = 1.618
1.000 rad / 0.628 rad = 1.5924 1.5924 x 1.01618 = 1.618
72° / 36° = 2
100 + 161.8 = 261.8 1.000 + 1.618 = 2.618
1.618 x 1.618 = 2.618
1,255 = 3.052
The angle of 108 degrees is confusing, because it does not belong to this group. Still, we need it to fatigue associated calculation in the matter.
8.4.2015*08:10 (1038 - 665)
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