Isosceles literally means "equal-legged" in Greek — the two matching sides of the triangle are imagined as a pair of legs.
Having two sides of equal length, used to describe a triangle with two equal sides and two equal angles.
From Late Latin isosceles, from Greek isoskelēs (ἰσοσκελής), meaning equal-legged, from isos (ἴσος, equal) + skelos (σκέλος, leg). Key roots: isos (Ancient Greek: "equal, even"), skelos (Ancient Greek: "leg").
Isosceles literally means "equal-legged" in Greek — imagining the two equal sides of a triangle as a pair of legs. The German equivalent, gleichschenklig, is a direct calque meaning exactly the same thing. The word skelos (leg) in isosceles is also related to the root of skeleton (originally "dried