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几何和三角函数概念
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Topics in 几何和三角函数概念
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线
2
直角三角形
3
距离公式
4
三角比
5
Intro to Areas
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角、直线和三角形
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Circles in Geometry
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几何
什么是点、线和平面?
用直线、平等线和三角形求角度
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角、直线和三角形
几何和三角函数概念
Circles in Geometry
Glossary for Geometry
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