Heptiamond 8 
Tessellations with Tileable Rotational Pairs 
Rotational Pair 6 
Basic Zigzag. 
Rotational Pair 10 
Basic Strip. 
Tessellation with the Rotational Triangle 

The Theme has two Rotational Triangles, copies of which are laid into a Strip. The example can also be seen as a tessellation of sixpiece ‘Windmills’ (blue fill). 
Other Tessellations 
Pair 6 and Winged Pair More complex combinations of the Strip are possible as well. Lengths of the Strip make ‘sharp’ Zigzags of two types. Shown are Basic, lengthened and Endless Zigzags: Each of these Stars is based on a type of Zigzag: The last Star needs a Divider (grey) before the Themes can repeat. 
Twisted Twins The Strips of the two middle diagrams can be exchanged (same navy lines). The last Theme requires an additional mirrored version to complete the pattern. 
Wallpaper There are only rotated Heptiamonds here in their six orientations, and no mirrored ones. The same layout of Rotational Triangles and Pairs 6 can be achieved with Heptiamond 16. 