I. Lines and angles 1. Know that two points determine a straight line and two intersecting straight lines determine a point. 2. Further understand that the line segment is the shortest among all the connecting lines between two points, and know the distance between two points. 3. Further understand straight lines, line segments and rays and their similarities and differences. 4. Know the parallel and intersecting (including vertical) relationship between two straight lines on the plane, and draw parallel lines and vertical lines as required. 5. Further understand the concepts of angle, acute angle, right angle, obtuse angle, right angle and fillet, and their relationships. 6. Correct use of protractor to measure and draw angles. Second, the plane graphics 1. Further master the characteristics of basic plane graphics such as rectangle, square, triangle, parallelogram, trapezoid and circle, and draw them as required. 2. Understanding the derivation process and relationship of several basic plane figure perimeter and area formulas can solve practical problems in life. 3 d graphics 1. Further master cuboids, cubes, cylinders and cones. ......