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海伦公式分步证明
Author:
math Ku
Topic:
Area
,
Similar Triangles
,
Triangles
Prove Heron's Formula
GeoGebra
New Resources
三角函数 的副本
直線的斜率：水平變化 & 鉛垂變化
龙形曲线-分形龙
盈利與虧蝕
活动三：应用性质
Discover Resources
台灣國旗
vector
地球儀
三角形的底和高
正方体展开图的副本
Discover Topics
Isosceles Triangles
Subtraction
Right Triangles
Integers
Limits