"The Area of ​​a Triangle" Calculation of the Area of ​​a Polygon PPT Courseware

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"The Area of ​​a Triangle" Calculation of the Area of ​​a Polygon PPT Courseware

Group work tip board

1. Do it: Find a way to convert triangles into the shapes you have learned.

2. Find out: What is the relationship between the transformed shape and the original triangle?

3. Think about it: How to find the area of ​​a triangle?

Practice and explore:

1. Give it a try. Using two identical triangles in your hand, can you try to form a parallelogram?

2. What is the relationship between the area of ​​the parallelogram and the area of ​​the triangle?

3. What is the relationship between the base of a parallelogram and the base of a triangle? What is the relationship between the height of a parallelogram and the height of a triangle?

Summary, summary:

1. What is the relationship between the base of the parallelogram and the base of the triangle used?

2. What is the relationship between the height of the parallelogram and the height of the triangle used?

3. What is the relationship between the area of ​​one of the triangles and the area of ​​the resulting parallelogram?

Group discussion: What did you discover through the above experiments?

1. Two identical triangles can be combined into a flat quadrilateral.

2. The base of this parallelogram is equal to the base of the triangle.

3. The height of this parallelogram is equal to the height of the triangle.

4. The area of ​​each triangle is half of the area of ​​the parallelogram.

So the following conclusions can be drawn:

The area of ​​a triangle = base × height ÷ 2

judge

1. The area of ​​a triangle is half of the area of ​​a parallelogram.

2. Two triangles can be combined to form a parallelogram.

3. If the areas of two triangles are equal, then the shapes are also the same.

4. Draw the largest triangle within a square. The area of ​​the triangle is half of the area of ​​the square.

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For more information about the PPT courseware "Calculating the Area of ​​a Polygon and the Area of ​​a Triangle", please click the Calculation of the Area of ​​a Polygon ppt and the Area of ​​a Triangle ppt tag.

"The Area of ​​a Triangle" Calculation of the Area of ​​a Polygon PPT Courseware 4:

"The Area of ​​a Triangle" Calculation of the Area of ​​a Polygon PPT Courseware 4 Operation and exploration requirements: (1) What figure can be created by putting two identical triangles together? (2) Can you calculate the area of ​​the spelled out figure? (3) The spelled out figure is the same as the original triangle..

"The Area of ​​a Triangle" Calculation of the Area of ​​a Polygon PPT Courseware 3:

"Area of ​​Triangles" Calculation of the Area of ​​Polygons PPT Courseware 3 Are the areas of the following three triangles equal? Why? The area of ​​the red triangle: 642=12 (square centimeters) The area of ​​the black triangle: 642=12 (square centimeters) The area of ​​the green triangle:..

"The Area of ​​a Triangle" Calculation of the Area of ​​a Polygon PPT Courseware 2:

"Area of ​​Triangles" Calculation of the Area of ​​Polygons PPT Courseware 2 Review Import (1) What is the formula for calculating the area of ​​a triangle? How is it derived? The formula for the area of ​​a triangle: S=ah2 (2) Who can tell me the formula for the area of ​​a triangle and the formula for a parallelogram...

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Update Time: 2024-10-03

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

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