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

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

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

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(1) What is the formula for calculating the area of ​​a triangle? How is it derived?

Triangle area formula: S=ah÷2

(2) Can anyone tell me what are the similarities and differences between the area formula of a triangle and the area formula of a parallelogram? Why is there a "÷2" in the formula?

(3) A triangle and a parallelogram have the same base and height. The base of the parallelogram is 3 meters and the height is 2 meters. The area of ​​a triangle is ( ) square meters, and the area of ​​a parallelogram is ( ) square meters.

Fill it out

Two identical triangles can be combined into one ( ). The base of this parallelogram is equal to ( ) and the height of this parallelogram is equal to ( ). The area of ​​each triangle is equal to the area of ​​the parallelogram ( ). Because the area of ​​the parallelogram is equal to ( ), the area of ​​the triangle is equal to ( ).

When calculating the area of ​​a triangle, what should we pay attention to regarding the base and height?

Note that the bottom and high should correspond.

summary:

The area of ​​the triangle: S=ah÷2

According to the formula for calculating the area of ​​a triangle, it can be deduced:

Height of triangle: h=2S÷a

The base of the triangle: a=2S÷h

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

"Calculation of the Area of ​​Triangles" Area of ​​Polygons PPT Courseware:

"Calculation of the Area of ​​Triangles" Area of ​​Polygons PPT Courseware Two identical acute-angled triangles can be combined to form a parallelogram. Two identical obtuse triangles can be combined to form a parallelogram. Two identical right triangles can...

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Update Time: 2024-10-15

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