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Angle Sum in a Triangle
Author:
Koo Wing Yan
Topic:
Angles
Angle Sum in a Triangle
GeoGebra
New Resources
漂亮的摇摆曲线
【案例】圆柱体内放置一个大球六个小球
圓的切線方程
三位數除以一位數（二）
球体的体积推导（优化版）
Discover Resources
Add and subtract
螢橋國中 黃奕辰
同心圓
转动中的杠杆
"拈" 類遊戲之一-搶21遊戲 The 21 game
Discover Topics
Root
Polygons
Cube
Median Line
Cosine