Polydron

This activity investigates how you might make squares and pentominoes from Polydron.

A Cartesian Puzzle

Find the missing coordinates which will form these eight quadrilaterals. These coordinates themselves will then form a shape with rotational and line symmetry.

Symmetry Challenge

Systematically explore the range of symmetric designs that can be created by shading parts of the motif below. Use normal square lattice paper to record your results.

Symmetrical Semaphore

Stage: 2 Challenge Level:

This is the semaphore alphabet:

Image by kind permission of http://inter.scoutnet.org/

Someone at the top of the hill sends a message to a friend in the valley. A person in the valley behind also sees the message being sent. They get the same message. What is it?

Are there any words that can make sense when viewed from the front and the back? We have found at least one!

(Dave wrote to say that in reality, at the beginning of every message the sender should send 'J', which is also the direction sign. This way the receiver knows which way round the message is and so can translate it correctly from front view or back view. Thank you, Dave.)