SYMM | MMY5

Greetings, students of 4A. It is I, here to send you a message from beyond (the classroom, not from the grave).

Some of you might have this symbol all over your worksheet:

That is what you call a crosshair. It is used in many contexts but some of you might recognize it from your shooter or sniper games. It draws your focus to the centre, and is used for ACCURATE positioning.

If YOU see a crosshair on your worksheet it means I have an issue with the accuracy of your drawing. Sometimes I also indicate with an arrow WHERE you were inaccurate.

Here's what you need in your symmetry drawings:
1) use a pencil and ruler
2) use a dashed line - - - - - - - - - -
3) it must cut the figure EXACTLY into two equal halves that are mirror images
4) let the line start and end OUTSIDE the figure, like this:

And remember your origami paper?

The fold you made was the line of symmetry. If you didn't realize that then I hope you are #mindblown.

 

Here is the shape that Gabriel made with his origami paper. Arrange it one way and you have a symmetric shape, the other and it isn't.

At first it isn't symmetric:

Then we flip one half and voila! Symmetric!

Lastly, if you're still not clear or satisfied with the demonstration of the dollar sign NOT being a symmetric shape, then... be a little hardworking and draw it out for yourself! Hard work pays off :D

That's all, folks. Take care of yourselves, of one another, and always be nice.