Real and implied triangles

In these six images, three are implied triangles and three are real triangles.

The two trees are real triangles from the base of the leaves to the tip of the leaves. The fact that its kept tidy helps define the triangle shape.

The firemen and the little boy create a triangle on this childrens ride.

 Again this shows a implied triangle, The two men create the outer points while the little boy creates the tip of the triangle.

 The wings of this bird are showing a triangle. Im not sure if this is implied or real, I would be inclined to go more towards implied.

 Real triangle in the climbing frame and implied with the man climbing the frame. I feel its a really good contrast between the two.

 Again this is real triangles shown by the childrens playground aparatus.