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ext angle car
Author:
pycchansir
GeoGebra
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找出對稱軸
兩位數加法
【案例】2018年全国1卷理科12题
四邊形的特性
第八周作业
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龍騰4_1-1課例4
三角形全等的理由 – 題2
同心圓和線段-3(線段到最外圓有小圓)
No.5
玖数小学数学（思维拓展）
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Rhombus
Isosceles Triangles
Rectangle
Intersection
Quadratic Equations