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Aristarchos' shadow enlargement
Author:
A. G. Gomez (agg29@ou.ac.uk)
Illustration of Earth shadow enlargement during Moon eclipses
GeoGebra
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Parallelograms: Quick Investigation
Poorly Drawn Parallelograms 3
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Icosahedron
Poorly Drawn Parallelograms
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Arithmetic: Skills & Concepts
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Buried Treasure (A)
Hình 55a trang 56
Dividing into Two Triangles
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