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