Matching Pairs Geometry vocabOnline version 3rd grade geometry vocab by Lori Darden 1 Parallel lines 2 right angle 3 line segment 4 Intersecting lines 5 vertex 6 line 7 angle 8 ray forms a square corner formed when 2 rays share the same endpoint. the endpoint shared by 2 rays. they do not cross is part of a line. It has 2 end points. It has 1 endpoint and goes on without end in 1 direction. straight path that goes on without end in 2 directions they cross