Teaching content: axisymmetric; Translation. Teaching objective: 1. Further understand the symmetry axis of graphics, explore the characteristics and properties of the symmetry axis of graphics, and draw axisymmetric graphics on grid paper. 2. Draw the simple graphics translated horizontally and vertically on the grid paper. Teaching emphases and difficulties: 1. Know the symmetry axis of the figure, and can draw a symmetrical figure. 2, can draw the translated graphics. Teaching suggestion: 1. Pay attention to let students really fully carry out activities and explorations. 2. Correctly grasp the teaching objectives. 3. Pay attention to the scientific nature of knowledge. Chapter Name Movement of Graphics (II) The teaching goal of 1 required by the curriculum standard is to further understand the symmetry axis of graphics, explore the characteristics and properties of the symmetry axis of graphics, and draw an axisymmetric graphic on grid paper. 2. Draw the simple graphics translated horizontally and vertically on the grid paper. Content Analysis Students have initially perceived the symmetry, translation and rotation phenomena in their lives in the second grade, and have a preliminary understanding of axisymmetric graphics, and can draw simple axisymmetric graphics on grid paper. On this basis, this unit allows students to further understand the symmetry of graphics, explore the characteristics and properties of graphic symmetry, learn to draw an axisymmetric graphic on grid paper, and develop the concept of space. Senior two students already know the symmetry phenomenon in daily life, have the concept of axisymmetric figure, and can draw an axisymmetric figure and the symmetry axis of the other half. Here is to further understand the concept of symmetry axis formed by two figures, explore the characteristics and properties of symmetry axis of figures, and learn to draw an axisymmetric figure of a figure on grid paper. The textbook of this unit first designs activities such as drawing an axis of symmetry, observing the characteristics of an axis of symmetry and drawing the other half of an axis of symmetry, so as to deepen the understanding of the graphic characteristics of an axis of symmetry and let students explore new knowledge on the basis of existing knowledge. Teaching emphasis: 1. Know the symmetry axis of the figure and draw a symmetrical figure. 2, can draw the translated graphics. Teaching difficulty 1. Know the symmetry axis of the figure and draw a symmetrical figure. 2, can draw the translated graphics. Teaching Strategies for Students to Prepare Axisymmetric Teaching before Class Teaching Purpose: To further understand the symmetry axis of graphics, explore the characteristics and properties of the symmetry axis of graphics, and draw axisymmetric graphics on grid paper. Emphasis and difficulty in teaching: knowing the symmetry axis of figures and drawing symmetrical figures. Problems, situations and teachers' activities; Students' activities; Media application; Design intent; Introduce new courses; Create a situation; Representation of axisymmetric images: Teacher: Are these pictures nice? Why is it beautiful? There are many objects in our life that make people feel beautiful because of symmetry. Today we will study these beautiful symmetrical figures together. (blackboard writing: axisymmetric graphics) Second, review the old knowledge 1. What other axisymmetric figures have you seen? 2. What is the axisymmetric figure? 3. Look at the pictures in the book and draw the symmetry axis. Third, learn new knowledge 1, for example 1 (1) Is this graph symmetrical? (2) What does this straight line in the middle mean? (3) Point A and Point A are two corresponding points in this diagram, and their distance to the symmetry axis is () square. (4) Point B and Point () are corresponding points, and their distance to the symmetry axis is () square. (5) Point C and point () are corresponding points, and their distance to the symmetry axis is the square of (). (6) I found that the distance between the symmetry axis and the opposite points on both sides of the symmetry axis in the axisymmetric figure is (). 2. Summary: In an axisymmetric figure, the distance between the opposite points on both sides of the axis of symmetry is equal. We can use this property to judge whether a graph is symmetrical or not. Or draw symmetrical figures. 2. Example 2 (1) guides students to think: A. How to draw? What to draw first? Draw what again? B.how long should each line segment be drawn? (2) On the basis of thinking, try to draw with a pencil. (3) Summary: 1. Find the key points of a given graph. 2. Calculate or measure the distance from the key point of the figure to the symmetry axis. 3. Find the symmetry point of the key point on the other side of the symmetry axis. 4. According to the given figure, connect the points in turn and draw the axisymmetric figure of the given figure. Classroom exercise: P84 Do one thing and do four things. Class summary: What did you gain from this class?