Where are the mirror lines (lines of symmetry)?
Which of your patterns also have rotational symmetry?
Investigate what happens if you reflect the blue flag in Mirror 1, then reflect that image in Mirror 2.
Do you get the same results for the red flag if you reflect it first in Mirror 2 then reflect that image in Mirror 1?
You might like to copy the […]
What do you know about robots? What are drones? Are driver-less cars actually robots? What do you think about robots that move around warehouses to pick up and carry loads from place to place or control complicated machinery in factories? What do you think about robots that mow lawns and clean floors?
In addition the diagram with the […]
Fold a piece of paper in two and tear out half a person. An old newspaper is good for this. Now open out your little person and flatten it. You have made a paper doll that is symmetrical about the fold line. The two halves of the doll on […]
Draw the diagram accurately starting with a regular pentagon.
Find all the angles in the diagram.
Label 4 sets of congruent triangles. Which triangles are similar?
Describe the symmetries of the shape (that is the transformations that map the shape onto itself).
Describe the symmetries […]
The wall painting on the house in this photo shows geometric transformations: reflections, rotations and translations. The symmetries of a design are the transformations that leave the pattern looking exactly the same.
Assume that the parts of the design that look the same are identical and that they only appear different because […]
One square is directly behind the other.
What is on the back of 100? 58? 23? 19?
Can you see a pattern?
Click here for an NRICH poster for your classroom […]