diamonds, hexagons and trapezoids can be drawn using combinations of same-size 60-degree triangles. if you have a ruler with a 60 degree line on it, you can make your own very easily. use graph paper if you have it to help keep the lines straight.
you can draw octagons using a combination of squares and 45-degree triangles.
i tried doing the math for a pentagon, but my brain fell out onto the floor, so you're own your own for that one. :lol: