Giza
 Penta

 building a pentagram is easy ...constructing polygons, etc is covered elsewhere herein ...basically... 360° / 5 = 72°
 curiously, duplicating and reducing: not to half of that, 62.5 ...but, to 63 puts a dot on an intersection exactly here converted to a cube temporarily to get the crosshairs in the wireframe
 that's the proportion... that puts dots on the X 165 63 11 x 15 7 x 9
 the above crossing lines are 0.82 wide
 above right: duplicating and resizing the diamond works out to be 1 x 1.41 square root of 2 = 1.41421356237...
 larger purple pentagram lines are 94.15 (for whatever earlier reason otherwise) ...and the smaller green lines are 35.95

 the lower dot for the inner pent is 18.9 south of center so, double that is the diameter of the inner circle: 37.8
 the upper outer dot is 49.5 north of center
 - 18.9 = 30.6 radius x 2 = 61.2 diameter for a series of circles on larger outer points

 duplicating another whole pentagram set, with outer disc reset to 100 puts the lines back to their original 1 unit width and dots to 2 diameter ...this is the original dimensional proportion the other 2 are based on...

 Giza
 Penta
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