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