... <看更多>

Perpendicular lines have slopes that are opposite reciprocals, so remember to ... Determining the slope of a perpendicular line can be performed mentally. ... <看更多>

Jun 18, 2019 - Fun ideas and activities for teaching parallel and perpendicular lines for middle school math class. See more ideas about middle school math, ... ... <看更多>

Edited answer: My first solution (see below) was for visualisation purposes only. But as you mentioned afterwards, you need the actual geometry. ... <看更多>

I think you've just over-complicated your algebra a little. The slope m of the p1-p2 line is given by: m = (y2-y1)/(x2-x1). ... <看更多>