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重难题组周练（1）——二次函数
Author:
程洁
Topic:
Quadratic Functions
GeoGebra
New Resources
兩組對邊相等的四邊形
sanjiaohanshu
算柱 (兩位數)
異分母分數減法
兩組對邊相等和有直角的四邊形
Discover Resources
正弦與餘弦值的大小關係
How to draw a triangle with ruler and compasses?
三次函數
求一數是另一數的幾分之幾？
畫三角形 題1d 的複本
Discover Topics
Percentages
Trigonometric Functions
Unit Circle
Continuity
Reflection