Math E-320:
Teaching Math with a Historical Perspective
Mathematics E-320:
Instructor: Oliver Knill
Office: SciCtr 434




The proof that the altitudes hit in a common point. The proof reduces it to the fact that the perpendicular bisectors intersect in a common point. Credit: I owe this remark to Cody Patterson, who learned it from a student of his.
Please send questions and comments to knill@math.harvard.edu
Math E320| Oliver Knill | Spring 2010 | Extension School | Harvard University