How to make fabric earrings<br>Make your template out of thin cardboard. Draw a simple shape on a thin piece of cardboard. Great starter shapes include circles, triangles, hearts, and leaves.
Three sided polygons are not recommended as starter shapes. 
It states that a triangle is a good starter shape. A three sided polygon is a triangle. The system did not realize a three sided polygon is a triangle.
( z1 recommend :polarity - :ARG1 ( z2 polygon :mod ( z3 dimension :quant 3 ) ) :ARG2 ( z4 shape :mod ( z5 start ) ) )