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