Slopes of Perpendicular Lines
Drag C so that the two lines are perpendicular to each other.[br]What is the relationship between their slopes?
Anthony Or. GeoGebra Institute of Hong Kong.
Orthocenter, Centroid, Circumcenter, Incenter, Euler Line
Shows the Orthocenter, Centroid, Circumcenter, Incenter, and Euler Line of a Triangle. Triangle may be manipulated to show how these are affected. Use the checkboxes to turn on or off each item.