| Category | Format | Size |
|---|---|---|
| Beijing Normal University Edition Fifth Grade Mathematics Volume 1 | pptx | 6 MB |
"Comparing the Areas of Figures" Area of Polygons PPT
Description
"Comparing the Areas of Figures" Area of Polygons PPT
Part One: Classroom Introduction
1. With the help of graph paper, the size of the graphic area can be directly judged.
2. Through communication, learn the basic method of comparing the area size of graphics.
3. Experience the relationship between changes in the shape of graphics and changes in area size.
Comparing the areas of graphs PPT, part 2: exploration of new knowledge
do you remember? What plane shapes have we learned?
Observe and compare the area sizes of the shapes below. What is the relationship?
Group cooperative learning exploration research:
1. Put the cut triangles or quadrilaterals together and place them.
2. Find two figures with equal areas and tell your partner how you found them?
Figure ② and Figure ⑥ have the same area. I found it through translation.
I translated picture ① to picture ③. The two figures overlap, so their areas are equal.
I smiled and found that you agree? Think about it and try it out.
Figure ⑤ and Figure ⑥ combined have the same area as Figure ⑧
Figure ⑨ and Figure ⑩ have the same area
After such division and transfer, the area of the figure has not changed. This is the mathematical principle of "compensation of incoming and outgoing".
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.
5. Cut the shape A into two parts so that they can be combined into shape B. If you want to form a figure C, how can you cut it?
Comparing the areas of graphs PPT, part 4 content: Class summary
1. Counting squares
2. Overlap method
3. Patchwork method
4. Cut and repair method
Comparing the areas of graphs PPT, Part 5: Classwork
1. Judge whether it is right or wrong, and mark √ if it is right.
①If the areas of the two figures are equal, then the shapes must also be the same. ( )
②If the two figures can completely overlap, then the areas must be equal. ( )
③Figures with different shapes may have the same area ( )
2. Fill in the blanks.
Two figures with the same shape and size have the same area ( ); two figures with equal areas have the same shape ( ).
3. A rectangle is 8 cm long and 6 cm wide. After cutting off the largest square from one side of the rectangle, what are the perimeter and area of the remaining part?
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" PPT download of the area of polygons:
"Comparing the Areas of Figures" PPT Download of the Area of Polygons Part One: Scenario Introduction Students, recall, what plane figures have we already learned? What is the perimeter of this rectangle? What part of the area is it? How can we know the area of a rectangle..
"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..
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Update Time: 2024-07-06
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