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Geometry: Angles Sum of Triangle (幾何：三角形內角和)
Author:
chisunch1
Topic:
Geometry
GeoGebra
New Resources
【案例】2018年全国1卷理科12题
漂亮的摇摆曲线
垂直線的斜率
祖冲之的期望：内棋与外棋
兩位數除以一位數（一）
Discover Resources
Rotational Symmetry - Octahedron
三角格紋
vertex
指数函数的副本
拋物面的光學性質
Discover Topics
Cube
Median Line
Intersection
Solids or 3D Shapes
Arithmetic Mean