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

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

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.

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. ( )

Are the areas of the two parallelograms in the picture below equal? Why? What is the area of ​​each parallelogram?

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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Update Time: 2024-09-05

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

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