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

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

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

1. Answer orally

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.

(1) Bottom 12 meters, height 7 meters;

(2) The height is 13 decimeters and the bottom is 6 decimeters;

(3) Bottom 2.5 cm, height 4 cm.

judge

(1) If the heights of two parallelograms are equal, their areas are equal ( ).

(2) The height of a parallelogram is certain. The longer the base, the greater its area ( ).

Ask students to use gestures to judge "right" or "wrong".

(1) It is known that the base of the parallelogram is 1.2 meters and the height is 0.8 meters. The formula for finding the area is 1.2 × 0.8. ( )

(2) The base of the parallelogram is 20 meters, the height is 16 meters, and the area is 320 meters. ( )

(3) The base of a parallelogram is 5 decimeters, the height is 0.5 centimeters, and its area is 2.5 square centimeters. ( )

(4) The base and height of the parallelogram are equal to the length and width of the rectangle respectively, and their areas must be equal. ( )

Two parallelograms have equal bases, equal heights, and equal areas.

If the areas of two parallelograms are equal and their bases are equal, then their heights are also equal.

If the areas of two parallelograms are equal and their heights are equal, then their bases are also equal.

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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 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...

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

"Calculation of the Area of ​​Parallelograms" Area of ​​Polygons PPT Courseware 2 Group Discussion: ① Compared with the original parallelogram, has the area changed? ② The length and width of the spelled rectangle are the same as the base of the original parallelogram. What does it have to do with Gao? ..

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