Interactive applet
Pythagorean Theorem
Drag the legs of a right triangle. Watch a² + b² and c² stay in lockstep.
Hands-on lab
Squares on each side
a² + b² = c²
9 + 16 = 25 = c², so c ≈ 5
Missions
- Build a 3-4-5 triangle
- Build an isosceles right triangle (a = b)
1/2 complete
Guided questions
Make a 6-8-10 triangle. What do you notice about the squares?
Reflection
How is the distance formula just the Pythagorean theorem in disguise?
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