"Is square root 2 a rational number?" PPT courseware 2

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Qingdao Edition Eighth Grade Mathematics Volume 2	pptx	6 MB

"Is square root 2 a rational number?" PPT courseware 2

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Upload Time: 2024-11-21

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"Is square root 2 a rational number?" PPT courseware 2

learning target:

1. Understand and be able to give geometric explanations to irrational numbers √2, √3, √5, √7, √10, etc.

2. Be able to mark irrational numbers such as √2, √3, and √5 on the number line.

Known: A line segment with unit length 1

(1) Can you make a line segment with length √2? What about √5?

(2) Think about it, how to make a line segment with a length of √3?

(3) Please make line segments with lengths of √7 and √10 respectively.

Observe the number line. What numbers do the points on the number line represent? What numbers are they? So, what conclusion can you draw? Communicate with classmates.

Not all points on the number line represent rational numbers. Irrational numbers can also be represented by points on the number line.

Think about it: Can you mark the point representing √5 on the number line?

1. Determine whether it is right or wrong:

(1) All irrational numbers can be expressed on the number line. ( )

(2) All points on the number axis represent irrational numbers. ( )

2. In Rt△ABC, if ∠B is a right angle, AB=6, BC=5, find the length of AC.

3. As shown in the figure, the side length of each small square on the graph paper is 1. In △ABC, there are ( ) sides with irrational number sides.

A, 0 B, 1 C, 2 D, 3

Keywords: Is the root number 2 a rational number? Teaching courseware, Qingdao edition eighth grade mathematics second volume PPT courseware download, eighth grade mathematics slide courseware download, Is the root number 2 a rational number PPT courseware download, .PPT format;

For more information about the PPT courseware "Is Root 2 a Rational Number?", please click on the Is Root 2 a Rational Number ppt tag?

"Is square root 2 a rational number?" PPT courseware:

"Is square root 2 a rational number?" PPT courseware Review Thoughts What is a rational number? Rational numbers positive integers: such as: 1, 2, 3, zero: 0 negative integers: such as -1, -2, -3, fractions positive fractions: such as 1/21/35.2 negative fractions such as -1/5, -5/ 6, -3.5 3...

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Update Time: 2024-11-21

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"Is square root 2 a rational number?" PPT courseware 2