Algebra teachers taught us the negative reciprocal for the slope of a perpendicular line, but why? Published -- Download video MP4 360p Recommendations 06:22 More students need to learn this way to solve absolute value equations 06:46 The Most Controversial Number in Math 08:11 How to factor a trinomial (5 easy ways) 14:47 The way math should be taught 20:00 3 Mind-Blowing Games that will change how you look at Chess 08:38 You use the quadratic formula all the time, but where did it come from? 11:37 Every Unsolved Geometry Problem that Sounds Easy 11:27 Precalculus teacher vs WolframAlpha student 13:05 Understand Slope - Parallel and Perpendicular Lines 16:55 The Test That Terence Tao Almost Failed 16:27 Fundamental Theorem of Calculus Explained | Outlier.org 05:28 How to complete the square (when solving quadratic equations) 11:28 Hardest Exam Question | Only 8% of students got this math question correct 24:50 05 - The Slope Intercept Equation of a Line, Part 1 (Slope Formula, Y-Intercept & More) 08:47 The Slope Formula - Algebra 14:02 Factor ANY Quadratic Equation Without Guessing | Outlier.org 10:02 Can You Pass Harvard University Entrance Exam? Similar videos 08:54 Proof: perpendicular lines have negative reciprocal slope | High School Math | Khan Academy 14:01 Intermediate Algebra Lecture 8.1 Part 6 02:26 Find Equation of Line Perpendicular to a Line Through a Given Point 06:56 Algebra 34 - Perpendicular Lines 09:18 Master slopes of parallel and perpendicular lines in 5 minutes!?!??? 25:05 KStevMath - Algebra 1 - Parallel and Perpendicular Lines 12:10 Geometry Equations of Lines 18:29 Parallel and Perpendicular Lines 09:12 Algebra 1: Chapter 6.5 (Part B): Slope Intercept, Point Slope, Parallel vs Perpendicular 06:22 Writing an Equation of a Perpendicular Line - Geometry 05:53 How to find the equation of the line fast and easy 01:45 How to find the slope of a perpendicular line given an equation! Easy explanation 00:45 Slopes of Perpendicular Lines 13:26 Algebra | Writing the Equation for Parallel and Perpendicular Lines 11:20 Slopes of Parallel and Perpendicular Lines 04:11 Parallel and Perpendicular Slopes 09:39 Slopes of Parallel and Perpendicular Lines - Sheaff Math 24:21 Algebra 1 Lesson 12 Parallel and Perpendicular Lines, More Slope Formula 1 More results