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可控坐标系
Author:
黄旭
Topic:
Coordinates
GeoGebra
New Resources
三位數除以一位數（二）
算柱 (兩位數)
異分母分數減法
球體建築師
兩組對邊相等的四邊形
Discover Resources
折射的現象
分點公式：P = (?)A + (?)B + (?)C
Similar triangles reasons 2
Travelling Waves
拼出三角形的副本
Discover Topics
Fractal Geometry
Planes
Trigonometric Functions
Probability
Linear Programming or Linear Optimization