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凹面鏡
Author:
joeyliaw.tw
GeoGebra
New Resources
算柱 (兩位數)
判斷球體
兩位數除以一位數（一）
兩位數加法
三位數除以一位數（二）
Discover Resources
mmvbcvbcv
Add and subtract (binary)
正三角形內一點P, 到三頂點距3,4,5
Lens2
congruent triangles_provided by Mr Yeung Kar Chun
Discover Topics
Similar Triangles
Mode
Subtraction
Geometric Transformations
Trapezoid