Like heaping earth to build which leaves only so many possible forms (like pyramids) there are only so geometric patterns before things start getting massively

Like heaping earth to build which leaves only so many possible forms (like pyramids) there are only so geometric patterns before things start getting massively complex. Just like the Swastika, the hex-star (seal of solomon, star of david), the cross, & the pentagram (which are all very ubiquitous), these are things you would discover yourself looking for interesting geometric figures, likely quite early in your search for designs. It seems to come down to angles that were easily measurable, like (in degrees) 30, 45, 60, 90.