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Interactive
National Council of Teachers of Mathematics

Nctm: Illuminations: Proof Without Words: Pythagorean Theorem

For Students 7th - 8th Standards
Students use this computer applet to visualize the Pythagorean Theorem.
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Activity
National Council of Teachers of Mathematics

Nctm: Illuminations: Proof Without Words: Pythagorean Theorem

For Students 9th - 10th Standards
This applet proves the Pythagorean Theorem "without words" using geometry.