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沪教版练习册7.4第4题
Author:
吴兴海
GeoGebra
New Resources
兩組對邊相等和有直角的四邊形
兩位數加法
判斷球體
三位數除以一位數（一）
四邊形的特性
Discover Resources
F1 Algebra
梯形的面積
內擺線
蚂蚁爬行最短距离问题的副本
诱导公式六（90°-α）
Discover Topics
Frequency Distribution
Curve Sketching
Means
Inequalities
Pythagoras or Pythagorean Theorem