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Proof Without Words
Author:
Šárka Voráčová
,
Steve Phelps
Drag the points in the sketch below. What do you notice? What does this prove? How does this prove it?
GeoGebra
Proof by H. Perigal (1830) and H. E. Dudeney (1917) See Cut the Knot:
Pythagorean Theorem
New Resources
alg2_05_05_01_applet_exp_2_flvs
alg2_05_05_01_slider_practice_flvs
Parallelograms: Quick Investigation
Finding Average Rate of Change of a Function
Poorly Drawn Parallelograms
Discover Resources
CompOx2
Two cars start simultaneously toward each other
Mr. Snowman8
Comparing Two Normal Curves
Geomatry
Discover Topics
Vectors
Difference and Slope
Angles
Surface
Hypothesis Testing