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椭圆内部全等的双椭圆构造.许兴华数学
Author:
许兴华数学
Topic:
Conic Sections
GeoGebra
New Resources
兩位數除以一位數（一）
拼砌四邊形
【案例】2018年全国1卷理科12题
球體建築師
判斷球體
Discover Resources
Mobius strip
Addition and Subtraction of Polynomials 2 (多項式的加減法2)
Example 2
四邊形外接正方形
同底等高的三角形面积相等.许兴华数学
Discover Topics
Poisson Distribution
Incircle or Inscribed Circle
Addition
Pyramid
Upper and Lower Sum or Riemann Sum