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sum of interior angle
Author:
cheung shan ni
Topic:
Angles
ok done
GeoGebra
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近似值：有效數字
直角坐標平面上的旋轉變換
四邊形的特性
算柱 (兩位數)
兩位數加法
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test
Homework1
How tall is that?
congruent triangles
極值問題
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Frequency Distribution
Scalene Triangles
Numbers
Exponential Functions
Function Graph