"Calculation of the Area of ​​Parallelograms" Area of ​​Polygons PPT Courseware 2

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"Calculation of the Area of ​​Parallelograms" Area of ​​Polygons PPT Courseware 2

group discussion:

① Compared with the original parallelogram, has the area of ​​the rectangle changed?

②What is the relationship between the length and width of the assembled rectangle and the base and height of the original parallelogram?

③Can the formula for calculating the area of ​​a parallelogram be derived from the formula for calculating the area of ​​a rectangle?

We convert a parallelogram into a rectangle whose area is equal to the area of ​​the original parallelogram. The length of this rectangle is equal to the base of the parallelogram, and the width of this rectangle is equal to the height of the parallelogram. Because the area of ​​the rectangle = length × width, the area of ​​the parallelogram = base × height.

If S represents the area of ​​the parallelogram, a represents the base of the parallelogram, and h represents the height of the parallelogram, then the formula for the area of ​​the parallelogram is...

S=ah

By cutting and piecing together, we can clearly see that a parallelogram can be converted into a rectangle. The area of ​​the converted rectangle is equal to the area of ​​the original parallelogram, and the length of the rectangle is equal to the base of the parallelogram, and the width of the rectangle is equal to the parallelogram. The heights of the quadrilaterals are equal.

Area of ​​rectangle = length × width

Parallelogram = base × height

It can also be written as: S＝a·h or S＝ah

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For more information about the PPT courseware "Area of ​​Polygons and Calculation of the Area of ​​Parallelograms", please click the Area of ​​Polygons ppt Calculation of the Area of ​​Parallelograms ppt tag.

"Calculation of the Area of ​​Parallelograms" Area of ​​Polygons Flash Animation Courseware:

"Calculation of the Area of ​​Parallelograms" Flash Animation Courseware for the Area of ​​Polygons This courseware is a teaching material for Unit 5 of the fifth grade mathematics volume of the Hebei Education Edition. Calculation of the Area of ​​a Polygon. Flash Animation Courseware for Calculating the Area of ​​a Parallelogram. The content is vivid and vivid. Please download it! ..

"Calculation of the Area of ​​Parallelograms" Area of ​​Polygons PPT Courseware 4:

"Calculation of the Area of ​​a Parallelogram" Area of ​​a Polygon PPT Courseware 4 1. Oral Answer What is the formula for calculating the area of ​​a parallelogram? How is it derived? The formula for the area of ​​a parallelogram: S=ah 2. Calculate the area of ​​each parallelogram below orally. (1)..

"Calculation of the Area of ​​Parallelograms" Area of ​​Polygons PPT Courseware 3:

"Calculation of the Area of ​​Parallelograms" Area of ​​Polygons PPT Courseware 3 1. Comparing the created rectangle with the original parallelogram, has the area changed? 2. What is the relationship between the length of the spelled rectangle and the base of the original parallelogram? What is the relationship between the width of the spelled rectangle and...

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Update Time: 2024-11-14

This template belongs to Mathematics courseware Jiangsu Education Edition Fifth Grade Mathematics Volume 1 industry PPT template

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