Skip to main content
### Number and algebra

### Geometry and measure

### Probability and statistics

### Working mathematically

### For younger learners

### Advanced mathematics

# Reflector ! Rotcelfer

An activity for two, three or four pupils working together.

## You may also like

### Times

### Transformation Tease

### Penta Play

Or search by topic

Age 7 to 11

Challenge Level

An activity for two, three or four pupils working together.

Well, that's three photos of three different ways of putting some blocks together. But there's a mirror behind the black strip. In the mirror you can see the reflections.

Now here are some more pictures but only the reflection is shown and you have to place blocks that will make this reflection.

There's a grid to help you.

Here's another for you to try.

Now here are two that will probably need more careful thinking.

So, one of your group makes a model, maybe something like this;

Others in the group now have to make the image that would be seen in the mirror.

You therefore make it like the one behind the mirror, as here;

You therefore make it like the one behind the mirror, as here;

Now it's over to you, remember to use a variety of colours in your models and the reflections must show the correct colour positions.

Which times on a digital clock have a line of symmetry? Which look the same upside-down? You might like to try this investigation and find out!

What are the coordinates of this shape after it has been transformed in the ways described? Compare these with the original coordinates. What do you notice about the numbers?

A shape and space game for 2, 3 or 4 players. Be the last person to be able to place a pentomino piece on the playing board.