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sine graph (reduce to 1/2 and then translate leftward by 15 degree)
Author:
Queenie Chan
GeoGebra
New Resources
三位數除以一位數（一）
【案例】2013年安徽高考15题
異分母分數減法
兩位數加法
四邊形的特性
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Angle in alternate segment
圓周_半圓內的半圓
初中数学教学素材
平面截距式的副本
美图欣赏-线绳艺术
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Limits
Triangles
Circumcircle or Circumscribed Circle
Cone
Quadrilaterals