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@ -8,7 +8,7 @@ $1米(m)=10分米(dm)=100厘米(cm)=1000毫米(mm)=0.001千米(km)$
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## 质量单位
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$ 1吨(t) = 1000千克(kg)
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$ 1吨(t) = 1000千克(kg) $
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$ 1千克 = 1000克(g) $
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知识点/四边形.md
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知识点/四边形.md
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# 四边形
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![](../图片/四边形.png)
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- 不规则凸四边形 trapezium
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- 梯形 trapezoid
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- 等腰梯形 isosceles trapezoid
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- 平行四边形 parallelogram
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- 筝形 kite
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- 菱形 rhombus
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- 长方形 rectangle
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- 正方形 square
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