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正三角形
Author:
陳幽靈
Topic:
Equilateral Triangles
New Resources
異分母分數減法
兩組對邊相等和有直角的四邊形
三位數除以一位數（一）
找出對稱軸
畫出對稱圖形
Discover Resources
math
World's Second-Hardest Easy Geometry Problem
Q2-3
圓錐截痕模型
一线三等角模型
Discover Topics
Secant Line or Secant
Line Segment
Combinatorics
Binomial Distribution
Exponential Functions