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Can you locate the lost giraffe? Input coordinates to help you search and find the giraffe in the fewest guesses.

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Isosceles Triangles

Draw some isosceles triangles with an area of $9$cm$^2$ and a vertex at (20,20). If all the vertices must have whole number coordinates, how many is it possible to draw?

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Eight Hidden Squares

On the graph there are 28 marked points. These points all mark the vertices (corners) of eight hidden squares. Can you find the eight hidden squares?

Route to Infinity

Stage: 3 Challenge Level: Challenge Level:2 Challenge Level:2

Take a look at the co-ordinates of the points along the route.

What do you notice about the order in which the route visits the points?

When do the arrows point up, and when do they point down?