Geometry can be such a challenge

Normally, I never post photos of people on the Internet, especially my own family. However, last night, I was looking for a certain photo and happened to come across this very old one of my son, taken so many years ago. We were living in Borneo (Far East) at the time, which was where my son was born, and his Dad, who loved Math, was working on a Math Degree in his spare time - for fun. Many years later, he finally got his Degree. My son, like most people, never felt the same way about Math. Anyway, every time I see this picture, it always makes me smile, so I thought I would add something totally different to my photostream this morning. I spent ages on trying to adjust the colour from the original (which is not the photo seen here), but in the end, I gave up.