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Reference Angle 參考角
Author:
Alex CHIK
Topic:
Trigonometry
GeoGebra
gMath 互動數學教室
http://www.geogebra.hk
New Resources
三位數除以一位數（一）
畫出對稱圖形
兩組對邊相等和有直角的四邊形
異分母分數減法
四邊形的特性
Discover Resources
[問題] 橢圓與雙曲線有共同焦點
正多邊形各邊中點連線所圍成的圖形v2
HW question locus 2
椭圆与圆的关系的副本
球体的体积推导
Discover Topics
Angles
Integral Calculus
Symmetry
Planes
Hyperbola