20150407 (Tue)-Sec3 A Math Coordinate Geometry by Gary Ang | Apr 7, 2015 | 16S4, Board-casts | 0 comments [vimeography id="99"] Went through EM income tax. AM coordinate geometry: Mid-point, gradient of perpendicular lines. Submit a Comment Cancel replyYour email address will not be published. Required fields are marked *Comment * Name * Email * Website Save my name, email, and website in this browser for the next time I comment. Δ