Shape

Bryan Peterson (Learning to see Creatively) says that shape is the principal element of identification. Firstly, it is best defined when the subject is frontlit or backlit. Secondly, there should be a strong contrast between the shape and it's surroundings.


Triangles
I have been looking for triangles, both real and implied. Again I have found that, focusing on a new aspect of the course, I am noticing things I had not noticed before.  As with Curves, I realise that triangles have formed a part of my photographs which have pleased me, but not thought about WHY they have had that effect. 
The following three examples of my Granddaughter playing in the garden in response to my question "How many different triangle shapes can you make?"showed me how much more difficult it is to capture a posed choice, instead of just clicking away as she plays!

This shot fits with Peterson's  point about contrast. Maddie's red polo shirt contrasts strongly with the green background. As for his first point, these shots were taken on a very dull day, as can be seen from the lack of shadows.

 I was so busy concentrating on Maddie that I didn't notice that the garden shed is in the frame. It  would have been a much better shot if I had asked her to move a few paces to her left!
Unfortunately, it began to rain heavily as I realised this and so could not repeat the shot.

I think Maddie had as much fun as I did!