Can you work out the dimensions of the three cubes?
From the measurements and the clue given find the area of the square that is not covered by the triangle and the circle.
Scientist Bryan Rickett has a vision of the future - and it is one
in which self-parking cars prowl the tarmac plains, hunting down
suitable parking spots and manoeuvring elegantly into them.
A white cross is placed in a red disc as shown and the resulting
figure is symmetrical.
What is the area of the disc still showing?