WHICH IS WHICH? WHAT CAN WE DO TO REMEMBER? Look at reflection, translation and rotation.
-
Upload
erica-davidson -
Category
Documents
-
view
215 -
download
0
Transcript of WHICH IS WHICH? WHAT CAN WE DO TO REMEMBER? Look at reflection, translation and rotation.
![Page 1: WHICH IS WHICH? WHAT CAN WE DO TO REMEMBER? Look at reflection, translation and rotation.](https://reader035.fdocuments.in/reader035/viewer/2022062805/5697bfe11a28abf838cb3b42/html5/thumbnails/1.jpg)
WHICH IS WHICH?WHAT CAN WE DO TO REMEMBER?
Look at reflection, translation and rotation
![Page 2: WHICH IS WHICH? WHAT CAN WE DO TO REMEMBER? Look at reflection, translation and rotation.](https://reader035.fdocuments.in/reader035/viewer/2022062805/5697bfe11a28abf838cb3b42/html5/thumbnails/2.jpg)
DefinitionsFlip (Reflection)
Slide (Translation)Turn (Rotation)
![Page 3: WHICH IS WHICH? WHAT CAN WE DO TO REMEMBER? Look at reflection, translation and rotation.](https://reader035.fdocuments.in/reader035/viewer/2022062805/5697bfe11a28abf838cb3b42/html5/thumbnails/3.jpg)
Reflection
Is all about looking at it in a mirror. If a shape can reflect itself perfectly then we
call this a line of symmetry. In other words it’s the same shape folded in half and fitting perfectly.
You can be given a line to reflect a shape over. Let’s look at that:
HereLet’s look at a SATs question:
![Page 4: WHICH IS WHICH? WHAT CAN WE DO TO REMEMBER? Look at reflection, translation and rotation.](https://reader035.fdocuments.in/reader035/viewer/2022062805/5697bfe11a28abf838cb3b42/html5/thumbnails/4.jpg)
![Page 5: WHICH IS WHICH? WHAT CAN WE DO TO REMEMBER? Look at reflection, translation and rotation.](https://reader035.fdocuments.in/reader035/viewer/2022062805/5697bfe11a28abf838cb3b42/html5/thumbnails/5.jpg)
![Page 6: WHICH IS WHICH? WHAT CAN WE DO TO REMEMBER? Look at reflection, translation and rotation.](https://reader035.fdocuments.in/reader035/viewer/2022062805/5697bfe11a28abf838cb3b42/html5/thumbnails/6.jpg)
Reflection top tips!
The best thing to do for reflection is to count the number of squares from the line each corner (vertices) are and draw a dot.
All you have to do then is connect the dots on the other side of the line!
Try this one:
![Page 7: WHICH IS WHICH? WHAT CAN WE DO TO REMEMBER? Look at reflection, translation and rotation.](https://reader035.fdocuments.in/reader035/viewer/2022062805/5697bfe11a28abf838cb3b42/html5/thumbnails/7.jpg)
Translation
Translation is about sliding the shape.
How many squares has the shaded shape translated?
![Page 8: WHICH IS WHICH? WHAT CAN WE DO TO REMEMBER? Look at reflection, translation and rotation.](https://reader035.fdocuments.in/reader035/viewer/2022062805/5697bfe11a28abf838cb3b42/html5/thumbnails/8.jpg)
Translation
ALWAYS Say the across squares first and the up or down squares second!
Try the SATs question:What could we do to make it easier?
![Page 9: WHICH IS WHICH? WHAT CAN WE DO TO REMEMBER? Look at reflection, translation and rotation.](https://reader035.fdocuments.in/reader035/viewer/2022062805/5697bfe11a28abf838cb3b42/html5/thumbnails/9.jpg)
![Page 10: WHICH IS WHICH? WHAT CAN WE DO TO REMEMBER? Look at reflection, translation and rotation.](https://reader035.fdocuments.in/reader035/viewer/2022062805/5697bfe11a28abf838cb3b42/html5/thumbnails/10.jpg)
Rotational symmetry
What is this?What is the rotational symmetry of each of
these shapes?
![Page 11: WHICH IS WHICH? WHAT CAN WE DO TO REMEMBER? Look at reflection, translation and rotation.](https://reader035.fdocuments.in/reader035/viewer/2022062805/5697bfe11a28abf838cb3b42/html5/thumbnails/11.jpg)
Rotation
A shape can be rotated about a point either clockwise or anti-clockwise.
![Page 12: WHICH IS WHICH? WHAT CAN WE DO TO REMEMBER? Look at reflection, translation and rotation.](https://reader035.fdocuments.in/reader035/viewer/2022062805/5697bfe11a28abf838cb3b42/html5/thumbnails/12.jpg)
Here’s a question from a SATs paper:
Here is a shape:
Which shows it after it has been turned?
![Page 13: WHICH IS WHICH? WHAT CAN WE DO TO REMEMBER? Look at reflection, translation and rotation.](https://reader035.fdocuments.in/reader035/viewer/2022062805/5697bfe11a28abf838cb3b42/html5/thumbnails/13.jpg)
The diagram is turned. Draw the three missing shapes