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GeoGebra Classroom

29 Proof Without Words

作者：Linda Bollman, Steve Phelps

Drag the points. Drag the slider. What do you notice? What does this prove? How does this prove?

Based on http://45.media.tumblr.com/9e608e03763922f7620fa7b21487f640/tumblr_nywxpgk6631uk13a5o1_500.gif

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