Can you prove that the sum of the distances of any point inside a
square from its sides is always equal (half the perimeter)? Can you
prove it to be true for a rectangle or a hexagon?
The Earth is further from the Sun than Venus, but how much further?
Twice as far? Ten times?
Swimmers in opposite directions cross at 20m and at 30m from each
end of a swimming pool. How long is the pool ?