For the latest step in Cee’s Compose Yourself Challenge we are asked to consider the geometrical shapes within our images. Unusually, I had no problem finding potential candidates for inclusion in this selection. Quite the reverse, in fact, which is why, as an extra challenge, I confined myself to photographs that I took in Australia – mostly in and around Sydney – a few years ago.

This first image – of an upturned boat on the beach at Watson’s Bay, across the harbour from the city – contains multiple geometric shapes, in terms of both subject and composition:

Below are pairs of images featuring the most common geometric shapes. Hover over any picture for a (slightly) fuller comment.

Circles

Detail from the deck of a small boat. The circle of the lifebelt is repeated by the coil of rope.

The hub of an old cartwheel in the Hunter Valley

Triangles

The iconic Sydney Opera House

Lots of triangles in this image of a church near Circular Quay in the oldest part of Sydney.

Rectangles

Plenty of squares and rectangles in this image of the upper floor of a traditional Sydney house.

Detail of the steelwork of the Sydney Harbour Bridge (for an idea of scale, those are people on the top).

Cee’s Compose Yourself Challenge: Geometry