Euclidean group
type: Concept
preferred label: گروه اقلیدسی @fa
related: congruent angles

equivalence relation
type: Concept
preferred label: رابطه هم‌ارزی @fa
related: congruent angles

reflection
type: Concept
preferred label: بازتاب @fa
related: congruent angles

isometry
type: Concept
preferred label: طول‌پایی @fa
related: congruent angles

congruent angles
type: Concept
broader: angle
preferred label: زوایای همنهشت @fa
related: Euclidean group
related: reflection
related: equivalence relation
related: perpendicular
related: isometry
related: parallel postulate

angle
type: Concept
narrower: congruent angles
preferred label: زاویه @fa

perpendicular
type: Concept
preferred label: عمود @fa
related: congruent angles

parallel postulate
type: Concept
preferred label: اصل توازی @fa
related: congruent angles