这是北师大版的小学数据五年级的第二单元的内容：轴对称和平移；涉及几何，生动有趣，更多思路，结合生活现实，有思维拓展；---**Overall Title:**
二 轴对称和平移
(Two: Axisymmetry and Translation)
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**Section: 轴对称再认识 (一) (Re-understanding Axisymmetry (1))**
**Textual Information:**
下面是我们经常见到的一些平面图形。
(Below are some common plane figures we often see.)
**Chart/Diagram Description (Geometric Figures):**
* **Type:** A collection of 8 different 2D geometric shapes, each labeled with a number from ① to ⑧. They are arranged in two rows of four.
* **Main Elements:**
* Figure ①: A red, vertically oriented rectangle.
* Figure ②: A blue square.
* Figure ③: An orange parallelogram (not a rectangle).
* Figure ④: A yellow isosceles trapezoid.
* Figure ⑤: A blue rhombus, oriented with its diagonals horizontal and vertical.
* Figure ⑥: A cyan, horizontally oriented rectangle.
* Figure ⑦: An orange isosceles triangle.
* Figure ⑧: A light blue rhombus, oriented with its diagonals horizontal and vertical, appearing more vertically elongated than Figure ⑤.
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**Question 1:**
**Question Stem:**
把附页1中的图1剪下来, 折一折, 填一填。
(Cut out Figure 1 from Appendix Page 1, fold it, and fill in.)
轴对称图形有: ______。
(Axisymmetric figures include: ______.)
*Note: "图1" (Figure 1) likely refers to the entire collection of 8 figures presented above.*
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**Question 2:**
**Question Stem:**
图③是轴对称图形吗？淘气和笑笑的观点不一样，你同意谁的说法？
(Is Figure ③ an axisymmetric figure? Taoqi and Xiaoxiao have different opinions, whose statement do you agree with?)
**Other Relevant Text (Speech Bubbles and Annotations):**
* **Taoqi (left boy's statement):**
* Content: 左右两边的图形大小和形状都一样，它是轴对称图形。
(The figures on both the left and right sides are the same in size and shape, it is an axisymmetric figure.)
* Annotation: A dashed vertical line is drawn through the center of Figure ③ (the orange parallelogram) within his speech bubble, suggesting his proposed axis of symmetry.
* **Xiaoxiao (right girl's statement):**
* Content: 图③无论沿哪条直线对折，两边图形都不能完全重合，它不是轴对称图形。
(No matter which line Figure ③ is folded along, the two sides cannot completely overlap, it is not an axisymmetric figure.)
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**Question 3:**
**Question Stem:**
你能找到几条对称轴？画一画，并与同伴说一说。
(How many axes of symmetry can you find? Draw them, and discuss with your partner.)
**Table Content:**
* **Table Header Row:**
* 图形 (Figure)
* 对称轴条数 (Number of axes of symmetry)
* **Table Data Rows:**
* **Row 1:**
* Figure Cell: An isosceles triangle, with a dashed vertical line drawn from its apex to its base, indicating an axis of symmetry.
* Number of Axes Cell: 1
* **Row 2:**
* Figure Cell: A rectangle (horizontally oriented).
* Number of Axes Cell: (Blank)
* **Row 3:**
* Figure Cell: A square.
* Number of Axes Cell: (Blank)
* **Row 4:**
* Figure Cell: An isosceles trapezoid.
* Number of Axes Cell: (Blank)
* **Row 5:**
* Figure Cell: A rhombus (oriented with its diagonals horizontal and vertical).
* Number of Axes Cell: (Blank)
* **Row 6:**
* Figure Cell: An equilateral triangle.
* Number of Axes Cell: (Blank)
* **Row 7:**
* Figure Cell: A kite or rhombus (oriented with its diagonals horizontal and vertical, appearing more vertically elongated than the rhombus in Row 5).
* Number of Axes Cell: (Blank)