A wreath is constructed from numerous pieces regular 10-gons, leaving the red section in the middle. What is the ratio red : green.
Categories
Wreath
Tag: decagon
Categories
Bandaged head
A regular decagon and triangles from vertices and side midpoints. What fraction is red?
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The pentangle flower
Multicoloured pentangle in a red circle. Rhombuses form two levels of petals growing outward, forming a decagon. Show that the opposite sides of the two interleaved pentagons are equal in pairs and also equal and parallel to the sides of the pentangle.