轴对称图形双语课课件.ppt

文档介绍：Symmetric Figure
Changsha Yali middle school
Li Cai
About Paper Cutting
About Paper Cutting
About Paper Cutting
Exploration
DIY
Take out a piece of paper and a small pair of scissors.
Then fold the paper in the middle and draw a picture
Cut down the picture follow the line
Show the picture to everybody here
Example
Definition
Symmetric Figure
————is an axially symmetrical object, whose appearance is unchanged if folded around some line in a way .
Axis of Symmetry
————this line is called the Axis of Symmetry.
Practice
Think about some symmetrical objects in our daily life.
Dragonfly
Airplane
Clover
Bear