"Congruence of Figures" Triangle PPT Courseware 2

Description

"Congruence of Figures" Triangle PPT Courseware 2

Definition of congruent figures

Some of these shapes are exactly the same, and if you stack them together, they will overlap.

Two figures that can overlap are called congruent figures.

Application of congruence in life 1:

Comment: The method to divide a figure into two congruent shapes is:

1. First determine the area of ​​each part.

2. Determine the dividing line.

Each dividing line passes through the same point, which we temporarily call the center point.

practise

As shown in Figure 1, can you divide it into two congruent shapes? How many methods can be used? Can it be divided into four congruent shapes? How many methods can be used?

Along the dotted line in Figure 2, divide the following graphics into two congruent graphics (find at least two methods), and communicate with your peers.

practice

one. Can you take the following parallelogram?

1. Divide it into two congruent shapes?

2. Divide it into four congruent shapes?

3． Divide it into three congruent shapes?

two. Find two points on the four sides of this parallelogram (it cannot be the midpoint of each side, nor the vertex), so that the line segment connecting these two points divides this parallelogram into two congruent figures.

Summary of this lesson

1. Two figures that can overlap are called congruent figures; (Definition)

2. The characteristics of congruent figures are that their shapes and sizes must be the same;

3. Application: It is widely used, such as;

(1) Divide a figure into two congruent figures;

(2) Put together several congruent figures into a large congruent pattern.

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For more information about the "Congruence of Triangular Figures" PPT courseware, please click on the Congruence ppt tab of triangle ppt figures.

"Congruence of Figures" Triangle PPT Courseware 3:

"Congruence of Figures" Triangle PPT Courseware 3 Self-study requirements: 1. In mathematics, what transformations do not change the size and shape of figures? 2. What are congruent shapes, congruent triangles, and the corresponding vertices, corresponding sides, and corresponding angles of congruent triangles? 3. Congruent triangles such as...

"Congruence of Figures" Triangle PPT Courseware:

"Congruence of Figures" Triangle PPT Courseware Learning Objectives: 1. Understand the concept of congruent figures. 2. Be able to identify congruent polygons (triangles) and their corresponding vertices, corresponding angles and corresponding sides. 3. Know the corresponding sides and angles of congruent polygons (triangles)..

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Update Time: 2024-11-21

This template belongs to Mathematics courseware Beijing Normal University seventh grade mathematics volume 2 industry PPT template

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