Education Technology

Year 10A: Euler Line

by Texas Instruments


The aim of this activity is to bring the Circumcentre, Orthocentre and Centroid activities together. The activity reviews the previous content and then uses the information to determine an equation for the Euler line in addition to a single formula that determines the gradient of the Euler line using only the gradients of the triangles sides. 


  • Gradient
  • Perpendicular
  • Midpoint
  • Straight line equation
  • Collinear

About the Lesson

Students review their results from the Circumcentre, Centroid and Orthocentre investigations to locate the Euler line and then test a formula that relates the gradient of each side of the triangle to the gradient of the Euler line.