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"Axisymmetric Phenomenon" Axisymmetric PPT Courseware 2
think about it
(1) Can you name objects with symmetrical characteristics in life and communicate with your peers?
(2) Can you fold the above picture in half along a straight line so that the parts on both sides of the straight line completely overlap?
(3) Fold a piece of paper in half, use the tip of a pen to mark the pattern as shown in the picture, and observe the resulting pattern. What does the part on either side of the crease matter?
If a figure is folded in half along a straight line and the parts on both sides of the straight line can completely overlap, then the figure is called an axially symmetric figure, and this straight line is called the axis of symmetry.
Do it
1. Take a piece of paper;
2. Put a drop of ink on one side of the paper, quickly fold the paper in half and flatten it;
3． Open the paper and lay it flat and observe the resulting pattern. What is the relationship between the ink patterns on both sides of the crease?
Look at each set of patterns in the picture below. What do you find?
For two figures, if they can completely overlap after being folded along a straight line, then the two figures are said to be axially symmetrical, and this straight line is the axis of symmetry.
summary
The axes are opposite to the figure, the axis of symmetry, and the two images are axially symmetrical.
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"Axisymmetric Phenomenon" Axisymmetric PPT courseware download in life:
"Axisymmetric Phenomena" Axisymmetric PPT courseware download in life Part 1: Answers and questions 1. Complete the textbook and do it. What did you find? What conclusion was reached? For two figures, if they can completely overlap after being folded in half along a straight line, then...
"Axisymmetric Phenomenon" Axisymmetric PPT teaching courseware in life:
"Axisymmetric Phenomenon" Axisymmetric PPT Teaching Courseware in Life Part One: Learning Objectives 1. Know the concept of axial symmetry and be able to identify simple axisymmetric figures and their symmetry axes. 2. Feel the beauty of symmetry and appreciate axial symmetry through observation, origami, and graphic appreciation.
"Axisymmetric Phenomenon" Axisymmetric PPT download in life:
"Axisymmetric Phenomenon" Axisymmetric PPT Download in Life Part One Content: Learning Objectives 1. Experience the process of observing axisymmetric phenomena in life and exploring the common characteristics of axisymmetric phenomena to further accumulate experience in mathematical activities and develop spatial concepts. 2. Understand Axisymmetric..