to draw a totally accurate decahedron start by drawing a circle 8 cm in diameter then draw six more all the way around it to create a seed of life then draw a another series of circles that are 5 cm in diameter and do these in the center of the original circles then follow this by a 3 cm diameter circle in the centers as well connect the corners to make a star and join them up like you would as if you using metatron's Cube and you will end up with this elaborate triangular pattern then find the center points draw out the decahedrons edges to create the pentagons and do this for all three of them they will all line up with these positions add the back bits and the corners and you will then have a totally accurate impr proportion decahedron add some highlights to make it look more 3D