Using Parallel and Perpendicular Lines Forums Main Page › Forums Main Page › Geometry › Using Parallel and Perpendicular Lines This topic has 0 replies, 1 voice, and was last updated 12 years, 4 months ago by Anonymous. Viewing 0 reply threads Author Posts August 20, 2012 at 1:51 pm #111 AnonymousInactive What are some creative ways of teaching/explaining this? Author Posts Viewing 0 reply threads You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In