"Beauty of Patterns" PPT Courseware 2

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"Beauty of Patterns" PPT Courseware 2

What is an axially symmetrical figure?

Fold the figure in half along a straight line so that the parts on both sides can completely overlap. Such a figure is an axially symmetrical figure.

The line along which the crease lies is called its axis of symmetry.

The straight line where the crease is located is called the axis of symmetry of the figure.

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Take out the learning tools we prepared and fold them to see which of our common shapes are axisymmetric shapes? How many axes of symmetry does each have? The reason why it is not an axially symmetrical figure.

A rectangle has a total of ( ) axes of symmetry.

A square has a total of ( ) axes of symmetry.

An isosceles triangle has a total of ( ) axes of symmetry.

An equilateral triangle has a total of ( ) axes of symmetry.

An isosceles trapezoid has a total of ( ) axes of symmetry.

A circle has a total of ( ) axes of symmetry.

In an axially symmetrical figure, the symmetry points on both sides of the symmetry axis are equidistant from the symmetry axis. This is the property of an axially symmetrical figure.

We can use this property to determine whether a figure is an axially symmetrical figure, or to make an axially symmetrical figure.

Fill it out

1. Today I learned about axisymmetric graphics. I know that if a shape is folded in half along a straight line, the shapes on both sides can ( ). This graphic is ( ). The straight line where the crease is located is called ( ).

2. Through study, I also know that the graphics we have learned before, such as ( ), ( ), ( ), etc., are all axis-symmetric graphics. For example, ( ) has more than one axis of symmetry.

Let’s all look for it:

1. The numbers for approximately axially symmetrical figures are: 0, ( ) ( )

( )……

2. Chinese characters that approximate axially symmetrical figures include: mouth, ( ) ( )

( ) ( ) ( ) ……

3. The English letters of approximately axially symmetrical figures are: A, ( )

( )( )( )( )……

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"Beauty of Patterns" PPT courseware 5:

"Beauty of Patterns" PPT courseware 5 1. Situation introduction It is composed of 5 identical ones. How did you get it? It is composed of 6 identical ones. How did you get it? What questions can you ask based on this information? What mathematical information do you know from the picture? ..

"Beauty of Patterns" PPT courseware 4:

"Beauty of Patterns" PPT courseware 4 1. Situation introduction What are the characteristics of these graphics? What questions can you ask? 2. Collaborative exploration What are the characteristics of these graphics? Fold the figure in half along a straight line. If the parts on both sides of the straight line can completely overlap, such a figure...

"Beauty of Patterns" PPT courseware 3:

"Beauty of Patterns" PPT Courseware 3 The opposite direction of clockwise rotation is counterclockwise rotation. The same direction as clockwise rotation is clockwise rotation. How to use rotation to obtain this windmill-shaped pattern? Rotate 90 degrees clockwise around point O. Rotate counterclockwise around point O 3 times continuously.

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Update Time: 2024-11-21

This template belongs to Mathematics courseware Qingdao Edition Fifth Grade Mathematics Volume 1 industry PPT template

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