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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
兩位數加法
兩位數除以一位數（一）
兩組對邊相等和有直角的四邊形
【案例】圆柱体内放置一个大球六个小球
算柱 (兩位數)
Discover Resources
三次函數02
比較角的大小
三角形的心
因數（1至24）
中考考题旋转全等的探究-4
Discover Topics
Dilation
Quadratic Equations
Conditional Probability
Distributions
Geometric Mean