Geometric shapes can form graphic silhouettes, and can provide a ‘frame within a frame’ for your subjects.
Black and white high contrast images work well with geometric shapes, clean hard edges and clearly defined contrasting areas.  Geometric shapes can form graphic silhouettes, and can provide a ‘frame within a frame’ for your subjects.  They also work well with contrasting tones, leave interesting shadows that mirror shapes and objects and provide juxtaposition in a scene that draws the attention of your viewer. Geometric structures also tend to leave really interesting shadows which can look other-worldly in high contrast black and white.  Similarly, geometric patterns can work well in this style and add visual drama to an image.