Maths

| |
|
|
|
|
|
|
| Session 7, sort A:
Line Symmetry (30 minutes)In This Part: Finding Lines of Symmetry | The Perpendicular Bisector In Session 5, you saw three ways to shine habituss around: rotation, observation, and translation. If you can move an entire design in one of these ways, and that design appears unchanged, past the design is symmetric.If you can reflect (or flip) a figure everywhere a melody and the figure appears unchanged, then the figure has reflection remainder or line symmetry. The line that you reflect oer is called the line of symmetry. A line of symmetry dissevers a figure into two mirror-image halves. The flecked lines below are lines of symmetry:The dashed lines below are non lines of symmetry. Though they do stripe the figures in half, they dont create mirror-image halves.You can use a Mira (image reflector) or simply the process of cutting and folding to find lines of symmetry.  impress the PDF version of the figures above, and compare the lines proposed using a Mira.In Problems A1 and A2, sketch the figures or print the PDF files of the figures and show the lines of symmetry as dashed lines.|
|
|
| |
|

instance 1
Students may not recognise lines of symmetry when they are not vertical or horizontal.



For example, the arrow shown below has a line of symmetry, but the fact that it is not vertically or horizontally orientated means that students pmay not identify it.

 
Illustration 2
Students may think that a shape can altogether develop one line of symmetry or may only identify some of the lines that are present. For example, some students may be able to see just the vertical line of symmetry in the flower shape below (as in the first gear diagram), whereas others will see the three lines shown in the second diagram. In fact, there are are six lines of symmetry, as seen in the third picture.

 
Illustration 3
Students may think that all lines which divide a shape into two equal halves are lines of symmetry. For example,...If you expect to get a full essay, order it on our website: Orderessay



If you want to get a full essay, wisit our page: write my essay .