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Authoritative PPT Summary
"Understanding and Measurement of Figures" Figures and Geometry PPT Courseware
1. Introduction to the conversation and revealing the topic
Teacher talk:
Classmates, we have learned a lot about graphics so far. In today’s class we will review and organize some knowledge about graphics.
Teacher’s Blackboard Writing Topic: Review and Arrangement of Graphics
2. Review and sort out and build connections
(1) Raise questions and trigger classification
Question 1: Think about it, what graphics have we learned? Can you classify the graphics you have learned?
(The teacher will have to wait for this time for students to think independently.)
Question 2: Who can tell me how you classify it?
(In the exchanges between students and students, teachers and students, the classification of graphics is improved and written on the blackboard, and plane graphics and three-dimensional graphics are separated.)
(2) Review the characteristics and relationships of plane graphics
Question: Let’s review plane shapes first. So what do you know about these plane graphics? Well, you can combine these questions, think about it yourself first, and then discuss it with your friends. It is recommended that everyone make corresponding records. If you have any difficulties, you can raise your hand to the teacher.
Courseware provided:
(1) What are the connections and differences between straight lines, rays and line segments? What are the positional relationships between two straight lines in the same plane?
(2) What roles have we learned? When you look at an angle under a magnifying glass, does it change in size?
(3) What do you know about triangles?
(4) What do you know about parallelograms?
(5) What is the difference between the circle and the plane figure above? What are the characteristics of a circle?
3. Consolidate practice, expand and improve
1. Find the area of the colored part. (Unit: cm)
Question 1: If you are asked to paint the area, can you do it? Please try it first and see what different methods you can think of?
Default 1: Area of trapezoid and area of triangle (4＋12)×4÷2－4×4÷2
Default 2: Large trapezoid area (4+8)×4÷2
Default 3: Small triangle area + large triangle area 4×4÷2+8×4÷2
Question 2: Can you read their minds? Read the thoughts of your peers by name.
4. Summary, reflection and evaluation
Question:
1. Looking back, what did you gain and experience from today’s class?
2. Do you have any questions?
5. Assign homework
Homework: Page 86, do it.
On page 87, do questions 2 and 3.
Page 88, do it.
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"Understanding and Measurement of Figures" general review PPT courseware:
"Understanding and Measurement of Figures" General Review PPT Courseware The understanding and measurement of figures focuses on repeating the characteristics and relationships of various figures learned in primary school, as well as the calculation of the perimeter, area, and volume of some shapes. 1. What is the difference between a straight line, a ray and a line segment? Same level...