"Draw a Painting" Proportion PPT Courseware 2

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"Draw a Painting" Proportion PPT Courseware 2

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Determine whether the following quantities are directly proportional to each other?

1. The number of people in each row is certain, the total number of people and the number of rows.

2. A rectangle has certain length, width and area.

3． The base area of ​​a cuboid is constant, its volume and height are constant.

4． The numerator is certain, the denominator and the fraction value are certain.

5. A rectangle has a certain perimeter, length and width.

(1) Is the circumference of a circle proportional to its diameter? Why?

(2) According to the picture on the right, first estimate the circumference of the circle and then actually calculate it. (∏take 3.14)

①The circumference of a circle with a diameter of 5 cm is approximately ( ) cm, and the calculation result is ( ) cm.

②The circumference of a circle with a diameter of 15 cm is approximately ( ) cm, and the calculated result is ( ) cm.

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For more information about the "Proportion Drawing" PPT courseware, please click the "Proportion Drawing Drawing" ppt tag.

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Update Time: 2024-09-30

This template belongs to Mathematics courseware Mathematics Volume 2 for Grade 6 of Beijing Normal University industry PPT template

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