"Design using axial symmetry" Axisymmetric PPT courseware 2

Description

"Design using axial symmetry" Axisymmetric PPT courseware 2

teaching objectives

1. Able to create axially symmetrical shapes of simple plane figures as required.

2. Appreciate axial symmetry graphics in real life, be able to use axial symmetry to design some patterns, and experience the wide application and rich cultural value of axial symmetry in real life.

"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.

What is the nature of axial symmetry?

1. The line segment connected to the corresponding point is bisected perpendicularly by the axis of symmetry;

2. Corresponding line segments are equal; corresponding angles are equal.

Draw a perpendicular to the axis of symmetry l through point A, with the vertical foot O. Extend AO to B so that AO=BO. Point B is the corresponding point of point A on the straight line l.

Think about it, discuss it

Given the axis of symmetry L and a point A, can you draw the corresponding point A´ of point A with respect to L? What method did you use and why?

1. Draw a perpendicular to the axis of symmetry L through point A, and the vertical foot is B.

2. Extend AB to A´ so that B A´=AB

3. Point A´ is the corresponding point of point A on the straight line L

Guess and draw

The figure shows one half of a pattern, with the dashed line being the axis of symmetry of the pattern.

(1) Can you guess the shape of the entire pattern?

(2) Can you draw the other half of these patterns?

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.

summary

1. Construct a simple plane figure with axial symmetry

2. Able to use axial symmetry to perform some pattern designs

Keywords: axial symmetry teaching courseware, using axial symmetry to design teaching courseware, Beijing Normal University edition seventh grade mathematics volume 2 PPT courseware, seventh grade mathematics slide courseware download, axial symmetry PPT courseware download, using axial symmetry to design PPT courseware download ,.ppt format

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 3:

"Designing with Axial Symmetry" Axial Symmetry 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 me...

"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..

File Info

Update Time: 2024-11-22

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

Preview