"Calculation of Area" PPT courseware on the area of ​​rectangles and squares

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"Calculation of Area" PPT courseware on the area of ​​rectangles and squares

1. What is area?

The size of the surfaces of objects or the surrounding plane figures is called their area.

2. What are the commonly used units of area?

Square centimeters, square decimeters and square meters

3. The area of ​​a square with a side length of 1 cm is ( );

A square with a side length of 1 decimeter has an area ( );

A square with side length 1 meter has its area ( ).

Do it: take out your No. 4 school paper as shown in the picture below, please measure its length and width, and calculate its area.

Its length is 8 cm and its width is 2 cm. Its area is calculated to be: 16 square centimeters.

The area is fixed, but the length and width of the rectangle change. Please find the appropriate length and width to make its perimeter the largest and smallest.

Use your brain and wish you success!

Question 3 is a bit difficult! Don't be discouraged, as long as you work hard, you will gain something.

The sum of the lengths of the three sides remains unchanged, and one side is against the wall. Try to make the wall the length of the rectangle. Give it a try!

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Update Time: 2024-11-24

This template belongs to Mathematics courseware Jiangsu Education Edition Third Grade Mathematics Volume 2 industry PPT template

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