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Proof without word 4ab = (a+b)²-(a-b)²
作者：
Daniel Mentrard
主題：
代數
GeoGebra
最新資源
Rolling a Square
The Geometry of the Coefficients of a Quadratic Function
Rule of Sarrus - Determinant of a 3×3 Matrix
Limaçons
Random Polar Curve (1)
探索資源
Haag things
no_dbl_clk
The Limit of Velocity from Position
Unit 9 here you go
Test
References
探索主題
外接圓
面積
三角函數
角柱
Pythagoras or Pythagorean Theorem