To automobile drivers in the Western Hemisphere, the red octagon instantly communicates STOP. To the budding mathematician, the simple triangle, known in Greek as ‘delta,’ means change. A red heart puts us in mind of love.
To automobile drivers in the Western Hemisphere, the red octagon instantly communicates STOP. To the budding mathematician, the simple triangle, known in Greek as ‘delta,’ means change. A red heart puts us in mind of love.