Coordinates

Can you find a reliable strategy for choosing coordinates that will locate the treasure in the minimum number of guesses?

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?

What is the area of the triangle formed by these three lines?

Max and Mandy put their number lines together to make a graph. How far had each of them moved along and up from 0 to get the counter to the place marked?

Use simple trigonometry to calculate the distance along the flight path from London to Sydney.

Can you describe this route to infinity? Where will the arrows take you next?

Use the clues about the symmetrical properties of these letters to place them on the grid.

Can you draw perpendicular lines without using a protractor? Investigate how this is possible.

Stick some cubes together to make a cuboid. Find two of the angles by as many different methods as you can devise.

A tilted square is a square with no horizontal sides. Can you devise a general instruction for the construction of a square when you are given just one of its sides?