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
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. Play with card, or on the computer.
Where can you put the mirror across the square so
that you can still 'see' the whole square?
How many different positions are possible?
How many lines of symmetry does a square have?
Can you reflect part of the square so that you can
see a smaller square?
A rectangle? A kite? A hexagon? An octagon?
What do all the shapes have in common?
This problem is taken from 'Starting from
Mirrors' by David Fielker, published by BEAM Education. It can be
purchased from the BEAM website.