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Angle Sum in a Triangle
Author:
ksarnoff
,
Koo Wing Yan
Topic:
Angles
Angle Sum in a Triangle
GeoGebra
New Resources
兩組對邊相等的四邊形
四邊形的特性
画直线等分三角形的面积
拼砌四邊形
三位數除以一位數（二）
Discover Resources
gjh-g01-00 單項乘以兩項和
由線段與弧構成的封閉區域填色
比較角的大小
尺规作图
椭圆内反射
Discover Topics
Standard Deviation
Algebra
Centroid or Barycenter
Sequences and Series
Pie Chart or Circle Chart