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角的大小與角兩臂的長度有關？
Author:
cwc
GeoGebra
New Resources
異分母分數減法
兩位數除以一位數（一）
兩組對邊相等和有直角的四邊形
兩位數加法
柱體建築師
Discover Resources
百分數（小學）：折扣 / 賺賠
二元一次圖形
量角器
linear regression temp
仰角和俯角
Discover Topics
Rotation
Random Experiments
Standard Deviation
Parallelogram
Power Functions