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{{video|src=8G3dB-tSuUs|name=12 13 Abel 2 4 rectangles 1-desktop.m4v | {{video | ||
|src=8G3dB-tSuUs | |||
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|name=12 13 Abel 2 4 rectangles 1-desktop.m4v | |||
|title=Abel demonstrates the concept of a fixed area vs a changing perimeter. | |title=Abel demonstrates the concept of a fixed area vs a changing perimeter. | ||
|duration=7:9 | |duration=7:9 | ||