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平行四邊形面積
Author:
官長壽(longlife)
GeoGebra
New Resources
【案例】2018年全国1卷理科12题
兩組對邊相等和有直角的四邊形
【案例】2013年安徽高考15题
兩位數除以一位數（一）
異分母分數減法
Discover Resources
Angles in the Circumference and the Centre
glt-c02-09 五角柱旋轉
凹透镜
深圳2018 22
ggb创作
Discover Topics
Numbers
Quadratic Equations
Trapezoid
Vectors
Vectors 2D (Two-Dimensional)