Identical squares of side one unit contain some circles shaded blue. In which of the four examples is the shaded area greatest?
An equilateral triangle rotates around regular polygons and
produces an outline like a flower. What are the perimeters of the
Can you maximise the area available to a grazing goat?
Have a go at creating these images based on circles. What do you notice about the areas of the different sections?
Where should runners start the 200m race so that they have all run the same distance by the finish?