To make six sets using rhombuses, trapezoids, triangles, and hexagons, you would need a total of six sets. Each set would consist of one of each shape - a rhombus, a trapezoid, a triangle, and a hexagon. Therefore, you would need 6 sets x 4 shapes per set = 24 shapes in total to make six sets using these shapes.
6
Minimally, two (2) trapezoids are necessary to create a hexagon. (This solution comes from drawing a line straight across the center of the hexagon.) Most numbers (if not all) greater than two are also feasible, but with more finagling.
4
2 rhombuses and 2 triangles
Triangles are needed to form polygons of 3 sides or more as for instance a 6 sided hexagon needs 4 triangles and a 10 sided decagon needs 8 triangles.
Maybe 21 which is the 10th odd number OR 37 which is the 10th prime number
never tried it without my Gay lines so I wouldn't know for sure, but try 3 and see what you get
6
3
4 sqaure
The triangles are used to describe specific food groups and how many servings of each group are needed daily.
20