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