Sara and Will were sorting some pictures of shapes on cards. "I'll collect the circles," said Sara. "I'll take the red ones," answered Will. Can you see any cards they would both want?
Nine squares with side lengths 1, 4, 7, 8, 9, 10, 14, 15, and 18 cm can be fitted together to form a rectangle. What are the dimensions of the rectangle?
Complete the squares - but be warned some are trickier than they look!
Players take it in turns to choose a dot on the grid. The winner is the first to have four dots that can be joined to form a square.
Where can you put the mirror across the square so that you can still "see" the whole square? How many different positions are possible?
