What this lesson teaches
Pythagorean theorem.
Math in Action
Pythagoras Square Proof
Prove Pythagoras theorem by cutting and rearranging squares!
Duration35 min
Age GroupAges 12–14
DifficultyIntermediate
SubjectMath
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The learning connection
A visual, dissection proof of Pythagoras's theorem creates understanding of WHY the theorem is true — not just that it is. Students who understand the proof are significantly more flexible in applying the theorem to non-standard right-triangle situations.
Try it with your learner
1. Draw right triangle. 2. Draw square on each side. 3. Cut squares. 4. Show a2+b2=c2.