# The Nagel Line

The Nagel Line

The Nagel line is the line on which the centroid, incenter, Nagel point and Spieker center of a triangle all lie. In this Demonstration, the blue point is the centroid, the red point is the incenter, the green point is the Nagel point and the orange point is the Spieker center. You can vary the triangle using the three locators.