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