problem
Contact
Age
14 to 16
Challenge level
A circular plate rolls in contact with the sides of a rectangular
tray. How much of its circumference comes into contact with the
sides of the tray when it rolls around one circuit?
problem
Cyclic quad jigsaw
Age
14 to 16
Challenge level
A picture is made by joining five small quadrilaterals together to
make a large quadrilateral. Is it possible to draw a similar
picture if all the small quadrilaterals are cyclic?