5. The Centre of a Triangle

Posted on Posted in Compass & Straight Edge

Using a compass and straight edge, we find the four traditional centres of a triangle : i.e. the incentre, the circumcentre, the orthocentre and the centroid.    We also look at the Medial Triangle, and the Euler Line.  

The Centre of a Triangle (Compass and Straight Edge)

PowerPoint Lesson:
Compass and Straight Edge – The Centre of a Triangle

Compass and Straight Edge – The Centre of a Triangle (Thai version)

Download Worksheet (PDF):
Compass and Straight Edge -The Centre of a Triangle Worksheet_pg.1-2
Compass and Straight Edge -The Centre of a Triangle Worksheets_pg.3-4
Compass and Straight Edge -The Centre of a Triangle Worksheets_pg.5-6