The humble triangle can be a useful compositional device to improve your pictures.
Upright or inverted, they act as extra lead-in lines or can encapsulate the subject being photographed.
The triangle can be formed by tangible straight lines, or objects at each virtual corner.
Placing three objects in triangular formation is much stronger than the eye “bouncing” between two subjects – odd number repetition is best if possible.
[Fungi and Treestump – here, the main content of the picture forms a natural inverted triangle, albeit made from circular objects (repetition with different sizes). I was careful to line up the top “side” with the edge of the frame]