It would either have to be a hexagon or an octagon. I'm not a hundred percent sure.
Arachnids such as spiders and scorpions have chelicerae.
Spiders. horseshoe crabs, sea spiders, mites, ticks...and other arachnids.
pedipalps
Spiders with pincers in front, like the trapdoor spider, do have a unique hunting advantage compared to other spiders. These pincers, called chelicerae, help them grab and hold onto prey more effectively, giving them an edge in hunting.
From the phylum of arthropods is where the Spiders belong, it has chelicerae with fangs that inject venom and has eight leg. This air-breathing arthropods has 10 types, and based on science studies, an average spider has 2,230,000 cells.
A garden Spider Has 8 Legs
Like many other spiders, the jaw parts of black widow spiders are too small and delicate to chew up their prey. So these spiders pump digestive juices into the bodies of their prey. After a while, the digestive fluids will have liquified all the digestible content inside the prey's exoskelaton, and then the spider sucks the fluid back into its own body. Some other kinds of spiders have more robust chelicerae (the parts that are terminated by the fangs), and they have tooth-like protrusions on them. These spiders use their chelicerae to chew up the bodies of prey, adding digestive juices in the process, and so they are able to get nutrition from parts of the prey bodies that black widows can't get at.
Spiders with pincers, like the camel spiders, have unique features that set them apart from other arachnids. These spiders have large, powerful jaws called chelicerae that resemble pincers, which they use to capture and crush their prey. This distinguishes them from other arachnids, which typically have smaller, less specialized mouthparts.
Chelicerata is a subphylum of the phylum Arthropoda. It contains organisms like spiders, ticks, and scorpions. Organisms in Subphylum Chelicerata have a cephalothorax and a posterior abdomen. They have six pairs of appendages on their cephalothorax: Chelicerae, pedipalps, and four walking legs. Chelicerae are pinchers that crush food, and pedipalps are appendages that control food. They do not have mandibles, which are jaws, and they don't have antennae, so organisms in Subphylum Chelicerata technically aren't insects.
Animals with outer shells and segmented bodies are members of the phylum arthrapoda. This phylum includes insects and chelicerae's (spiders, millipedes, etc.).
Spiders share the same characteristics as others in the chelicerae subphylum including using a pointed appendage to grasp food. All chelicerata, including spiders, have six pairs of appendages that are not branched.
Chelicerae and mandibles are both types of mouthparts found in different groups of arthropods. Chelicerae are characteristic of arachnids (like spiders and scorpions) and typically consist of two segments, often functioning as pincers or fangs. In contrast, mandibles are found in crustaceans and insects, featuring a pair of jaw-like structures used for biting, chewing, or gripping food. The key difference lies in their structure, function, and the groups of animals that possess them.