3 rhombuses will fit into one Hexagon...so it would be 20x3
2 rhombuses and 2 triangles
3 blue rhombuses cover one yellow hexagon.
7 of them.
3 if you don't make them overlap.
90
9
3 rhombuses will fit into one Hexagon...so it would be 20x3
Infinitely many. Any rhombus can be divided into smaller rhombi, thereby increasing the total number.
2 rhombuses and 2 triangles
15
3 blue rhombuses cover one yellow hexagon.
7 of them.
3
2 rhombuses
3 if you don't make them overlap.
there are three rhombuses in an octagon.