A few additional bits that can be added. Considering equilateral and equiangular shapes and needing both to be regular. Considering acute-, right-, and obtuse-angled triangles as a different way to classify triangles than by sides (and being able to do both). And the -oid suffix on trapezoid meaning "like", so like a trapezium (just not quite one). Also seen in cuboid, like a cube, but not quite one.
Really rich examples! The isometric example that came to my mind was GCSE organic chemistry isomers/isomerism
A few additional bits that can be added. Considering equilateral and equiangular shapes and needing both to be regular. Considering acute-, right-, and obtuse-angled triangles as a different way to classify triangles than by sides (and being able to do both). And the -oid suffix on trapezoid meaning "like", so like a trapezium (just not quite one). Also seen in cuboid, like a cube, but not quite one.
Another cracker, Josh. Thank you!
I have a Yr 7 tutee and he got his Mum to help with ways to memorise types of triangles. She came up with “ice cream isosceles” 😁