Parallel and Perpendicular lines
{"Image DocumentName": "Parallel and Perpendicular lines", "Image ImageDescription": "Parallel lines have the same gradient. Perpendicular lines gradients are the negative reciprocals of each other. m1 x m2 = -1. Example: If line AB has a gradient of 2/3, and line CD is perpendicular to line AB, what is the gradient of CD? Gradient of CD = -3/2. Points are collinear if they lie on the same line \u2013 their gradients are equal.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}