"Axisymmetric Graphics" PPT Courseware 2

Description

"Axisymmetric Graphics" PPT Courseware 2

Symmetry phenomena are everywhere, from natural landscapes to molecular structures, from buildings to works of art, and even daily necessities, people can find examples of symmetry.

So, what is an axially symmetrical figure?

Axisymmetric graphics:

If a part of a figure, with a certain straight line as the axis of symmetry, can coincide with another part of the figure through axial symmetry, such a figure is called an axially symmetric figure.

This straight line is its axis of symmetry.

Compare to see who is smarter!

Is the figure below an axially symmetrical figure? If so, can you point out its axis of symmetry?

Is the figure below an axially symmetrical figure? If so, how many axes of symmetry are there?

Some graphics have so many axes of symmetry!

I will have to think carefully about finding the axis of symmetry in the future!

Conclusion: Some axisymmetric figures have only one axis of symmetry, but some axisymmetric figures have more than one axis of symmetry, and some axisymmetric figures even have countless axes of symmetry.

Comparison summary:

Axisymmetric graphics Two graphics are axially symmetrical

One graphic Two graphics

connect

1. Fold along a straight line, and the parts on both sides of the straight line can overlap each other.

2. All have axes of symmetry.

3． If an axially symmetrical figure is divided into two figures along the axis of symmetry, then the two figures are symmetrical about this line; if two axially symmetrical figures are regarded as one figure, then the figure is an axially symmetrical figure.

practise

1. Judgment

1.Axisymmetric figures must have an axis of symmetry ( )

2. An axially symmetrical figure has at least one axis of symmetry ( )

3. Two figures that are axially symmetric about a certain straight line must overlap each other ( )

4. Two figures that can completely overlap each other must be axially symmetrical figures ( )

2. Choice

1. Which of the following conditions is met for a graph to be an axially symmetrical graph? ( )

(A) Two figures that can overlap each other

(B) The shape and size of a figure on both sides of a straight line are the same

(C) If a figure is folded along a certain straight line, it can overlap with another figure.

(D) A figure is folded along a straight line, and the parts on both sides of the straight line can overlap each other.

2. A symmetrical figure must have an axis of symmetry, and the axis of symmetry is ( )

(A) must be a ray

(B) must be a line segment

(C) must be a straight line

(D) Either a straight line or a line segment is possible

Keywords: Axisymmetric graphics teaching courseware, Qingdao edition eighth grade mathematics volume PPT courseware download, eighth grade mathematics slide courseware download, axisymmetric graphics PPT courseware download, .PPT format;

For more information about the "Axisymmetric Graphics" PPT courseware, please click the "Axisymmetric Graphics ppt" tab.

"Axisymmetric Graphics" graphic motion Flash animation courseware:

"Axisymmetric Figures" Flash Animation Courseware for the Movement of Figures This courseware is a teaching material for the third unit of the third grade mathematics volume of the Hebei Education Edition. The Flash animation courseware for axially symmetric figures is an axially symmetrical figure. The content is vivid and vivid, so please download it! Keywords: graphics movement teaching course..

"Understanding Axisymmetric Figures" PPT courseware on the movement of graphics:

"Understanding Axisymmetric Figures" The Movement of Figures PPT Courseware Teaching Objectives 1. Combined with examples, experience the process of feeling the phenomenon of axial symmetry, observing and operating, etc., to understand axially symmetric figures. 2. Understand the meaning of symmetry, be able to find symmetry phenomena in life, and have a preliminary understanding of axis pairs..

"Axisymmetric Figures" PPT courseware 3:

"Axisymmetric Figures" PPT Courseware 3 Like this, a figure that can completely overlap on both sides after being folded in half is an axially symmetric figure. This straight crease is the axis of symmetry. Group discussion and report results Which graphics are axially symmetrical graphics? How many axes of symmetry does each have? A rectangle has two...

File Info

Update Time: 2024-09-15

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

Preview