"Comparing the Areas of Figures" Area of ​​Polygons PPT Download

Description

"Comparing the Areas of Figures" Area of ​​Polygons PPT Download

Part One: Scenario Introduction

Students, please recall, what plane graphics have we learned?

What is the perimeter of this rectangle? What part of the area is it? How can we know what the area of ​​a rectangle is?

You can use a ruler to measure its length and width, and then find its area.

You can put it on a small square of graph paper with a side length of 1 cm, and count how many small square squares with an area of ​​1cm2 it has, and you can know how big its area is...

Comparing the areas of graphs PPT, part 2: independent exploration

Tell me how you compare the sizes of areas?

The areas of pictures No. 1 and No. 3 are equal, so we use the method of counting squares.

We translate Picture No. 1 to the position of Picture No. 3. The two shapes overlap, so the areas of Picture No. 1 and Picture No. 3 are equal.

We found that putting Figure 1 and Figure 3 together makes Figure 4, so the area of ​​Figure 1 plus Figure 3 is exactly equal to the area of ​​Figure 4.

Our group discovered that the areas of pictures No. 2 and No. 6 are equal.

We also found that the area of ​​Picture No. 5 and Picture No. 6 combined is equal to that of Picture No. 8.

The shapes of Figures 9 and 10 are different, but their areas are equal. We divide Figure 9 first, then move and fill them, and transform them into Figure 10. Through this method, we also found that the areas of Figures 8 and 10 are also equal.

Comparing the areas of graphs PPT, Part 3: Classroom exercises

1. Which of the following figures has the same area as figure ①?

2. As shown in the picture, a rectangle is missing a piece. Which shape do you think can be added to make the rectangle complete?

3. Which of the following shapes can be made up of the two shapes on the left?

4. In the graph paper on the right, the side length of each small square represents 1cm. Please draw 3 different shapes with an area of ​​12cm².

Comparing the areas of graphs PPT, part 4 content: Class summary

What knowledge did you learn in this class?

1. With the help of graph paper, you can directly judge the size of the graphic area, and initially experience the application of counting squares and cut and repair methods in exploring the graphic area.

2. Through activities such as comparison, observation, and induction, experience the relationship between changes in the shape of graphics and changes in area size.

Keywords: Beijing Normal University edition fifth grade mathematics PPT courseware free download, compare the area of ​​graphics PPT download, polygon area PPT download, .PPT format;

For more information about the "Area of ​​Polygons Comparing the Areas of Shapes" PPT courseware, please click the Area of ​​Polygons PPT Comparing the Areas of Shapes PPT tag.

"Comparing the Areas of Figures" Area of ​​Polygons PPT teaching courseware:

"Comparing Areas of Figures" Area of ​​Polygons PPT Teaching Courseware Part One: Review of Old Knowledge Please recall, what plane figures have we already learned? ... ... ... Comparing the areas of graphs PPT, part 2: exploring new...

"Comparing the Areas of Figures" Area of ​​Polygons PPT:

"Comparing the Areas of Figures" Area of ​​Polygons PPT Part One Content: Classroom Introduction 1. With the help of graph paper, you can directly determine the area of ​​a figure...

"Comparing the Areas of Figures" Area of ​​Polygons PPT Courseware:

"Comparing the Areas of Figures" Area of ​​Polygons PPT Courseware Naughty has another discovery, think about it and do it. As shown in the picture, the areas of the two figures are equal. After such a division and padding, the area of ​​the graphic does not change. This is the mathematical complementation of incoming and outgoing..

File Info

Update Time: 2024-09-28

This template belongs to Mathematics courseware Beijing Normal University Edition Fifth Grade Mathematics Volume 1 industry PPT template

Preview