GEOMETRY

Hello children,
  As you know this unit of maths is all related to geometry!!  We will give you are few examples of our in-class topics, right here on the blog to support your learning. 
  Remember, not only can you find geometry in the classroom or on the blog, you can find it in everyday life!!
  After reviewing these contents, think for a moment about where you may have come across these concepts before!!
Have fun learning!!!
Miss Noelle



What is Symmetry?  Reflection?  Rotation? Translation? and Tesselation?
Lets find out!!

Symmetry is when you put an invisible line through the middle of an object and both sides match or when an object can be divided exactly into two halves by creating a line with a mirror. (Please click on the title to access video.)

If you used a mirror would you be able to divide this face exactly in half?

Are you able to use a mirror here to divide each shape exactly in half? 

Reflection or (Flip)- Reflection takes place when a shape is flipped across a line and faces the opposite direction. Because the shape ends up facing the opposite direction, it appears to be reflected, as in a mirror. Hence the name REFLECTION. (Please click on the title to get access to video.)

 

Can you flip each shape perfectly across the line?

Rotation is a transformation that turns a figure about a fixed point. Rotation is also called as turn. The fixed point around which a figure is rotated is called as centre of rotation. (Please click on the title to access video)


If you choose a point on any one of these green triangles & rotate it, will it follow the path of this shape?


Quick comparison below...

(Please click on diagram for video)


Translation simply means Moving... without rotating, resizing or anything else, just moving.
Every point of the shape must move the same distance  and in the same direction!! (Please click on title to access video clip.)

 
Can you see how the shapes are exactly the same but just moved around the grid?

Tesselation is created when a shape is repeated over and over again covering a plane without any gaps or overlaps. (Please click on the title to get video)

Are there any gaps or overlaps in this picture?

 

 How many of you have ever seen a floor like this?  Do the tiles overlap?  Are there any gaps in the placement of tiles?

 (Children, if you have any doubts or concerns regarding any of these topics please stop & see any of your teachers!) 

 Thanks!!  Miss Noelle