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.
3
3 triangles make up a hexagon.
It only takes to diamonds to form a hexagon, but three if it is a regular hexagon.
2
hexagon
I think 4 different ways
A hexagon has 2 trapezoids
Six, I would guess!
4
there are 2 draw a line down the center of the hexagon
Because there are 6 triangles in a hexagon, and 3 triangles in a trapezoid, there are 2 trapezoids in a hexagon.
A hexagon can be broken into any number, k (≥3) of trapezoids, and these will have 4k angles.
You need at least four triangles, or at least three trapeziums. Or two triangles and one trapezium.
6
4 sqaure
Two equal size isosceles trapezoids when joined together at their longest bases will form an irregular 6 sided hexagon.
2 rhombuses and 2 triangles
three