"Design using axial symmetry" Axisymmetric PPT courseware 3

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"Design using axial symmetry" Axisymmetric PPT courseware 3

"Symmetry is an idea through which people pursue throughout their lives and create order, beauty and perfection..." In the world we live in, many beautiful things are designed using axial symmetry. They not only decorate our lives, It also makes us feel the beauty and harmony of nature. Now let us use our brains and hands to discover beauty, feel beauty, and create beauty.

Do it

Take a piece of paper 30 centimeters long and 6 centimeters wide, fold it every 3 centimeters like an "accordion", and draw the letter E on the folded paper. Use a knife to dig out the drawn letter E and open the "accordion", and you will get a lace with the letter E as the pattern.

In the above activity, if you first fold the paper strip in half lengthwise, then fold it into an "accordion", and then continue the above steps, what kind of lace will you get?

As shown in the picture, take a thin square piece of paper and fold it in half along the diagonal line to get an isosceles right triangle. Then fold it in half along the high line on the bottom edge. Cut the resulting angular paper along the black line in the picture. , remove the part containing the 90° angle, open the folded paper, and lay it flat.

Practice sublimation

If you fold the square paper in half three times as shown above (as shown in the picture), then cut it along the arc and remove the smaller part, what will happen after unfolding? Can you draw the expanded shape?

Review the past and learn the new

The properties of axial symmetry: the line segments connected to corresponding points are bisected perpendicularly by the axis of symmetry; the corresponding line segments are equal; the corresponding angles are equal.

Come into life and create with your hands

Observe pattern analysis:

(1) Are they axisymmetric figures?

(2) What do these patterns mean in life?

Innovative design using hands and brains

1. Use two circles, two line segments, and two triangles to design an axially symmetrical pattern, and explain your design intention and the meaning you want to express.

2. Design an axially symmetrical pattern yourself and explain your design intention.

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For more information about the PPT courseware "Axisymmetric design using axial symmetry", please click the Axisymmetric ppt design using axial symmetry ppt tag.

"Designing with Axis Symmetry" Axis Symmetry PPT Courseware 2:

"Designing with Axial Symmetry" Axial Symmetry PPT Courseware 2 Teaching Objectives 1. Able to create axially symmetrical shapes of simple plane figures as required. 2. Appreciate the axial symmetry graphics in real life, be able to use axial symmetry to design some patterns, and experience the application of axial symmetry in reality..

"Design using axial symmetry" axial symmetry PPT courseware:

"Designing with Axis Symmetry" Axis Symmetry PPT Courseware Knowledge Review What is an axial symmetry graphic? What does it mean that two figures are axially symmetrical? 1. If a figure is folded along a straight line and the parts on both sides of the straight line overlap each other, then the figure is called axis pairing..

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Update Time: 2024-09-14

This template belongs to Mathematics courseware Beijing Normal University seventh grade mathematics volume 2 industry PPT template

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