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Balance (The Farmer's Stone)
Author:
John Ulbright
Topic:
Algebra
,
Equations
Based upon a wonderful Car Talk Puzzler - http://www.cartalk.com/puzzler/farmers-stone
GeoGebra
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Science Park 1
Multiplying 3-Digit by 2-Digit Numbers Using an Area Model
bewijs stelling van Pythagoras
רישום חופשי
The black friday GeoGebra :)
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melukis sudut 90
Lesson 5 - Rotations
Pythagoran Puzzle #3
'Tangram' Puzzle 'Cat'
Torus illusion II
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