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读作: 射线 AB

线. 直线. 射线. 线段. 读作: 射线 AB. B. A. 读作: 直线 AB ( 或直线 BA). B. A. 你知道吗?. 直线. ⒈ ( ) 没有端点,两端可以无限延长。. 射线. ⒉ ( )只有一个端点,可以向一端无限延长。. 线段. 3. ( )有两个端点,不能向两端无限延长。. 认线. G. H. C. ④. A. K. E. B. D. F. ⑤. W. ②. ③. ①. b. ⑥. ( ) 是线段,( )是射线,( )是直线. 在正确的句子后面画“ √ ”.

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读作: 射线 AB

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  1. 线 直线 射线 线段

  2. 读作: 射线AB B A

  3. 读作: 直线AB (或直线BA) B A

  4. 你知道吗? 直线 ⒈( )没有端点,两端可以无限延长。 射线 ⒉( )只有一个端点,可以向一端无限延长。 线段 3.( )有两个端点,不能向两端无限延长。

  5. 认线 G H C ④ A K E B D F ⑤ W ② ③ ① b ⑥ ( )是线段,( )是射线,( )是直线

  6. 在正确的句子后面画“ √ ” • 小华画了一条长5厘米的线段。( ) • 小红说:“有一条射线长30米。( ) • 小叶画了一条直线长6分米。 ( )

  7. •      ② •        ③ •       ④     虎山 狐狸洞

  8. 数一数,有几条线段。 3 ( )条 ( )条 10

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