Fiona wants to draw a 2-dimensional shape whose perimeter passes through all of the points (P, Q, R, S) on the grid of squares shown. Which of the following can she draw?
(i) A circle (ii) An equilateral triangle (iii) A square
If you have an idea for puzzle of the month, then please do let me know.
Don't forget to check out 'Teach Further Maths' - PowerPoints for Teachers and Students of A-Level Further Maths
...and the brilliant NEW educational card game 'Maths Trumps'