Most landscape designers ensure that their designs have strong connections by basing the design around a few fundamental shapes. Geometric entities such as circles and squares (or parts thereof) of each are commonly used. The figure below illustrates this; the grassed play area, entertaining space, water feature and steppers linking spaces are based on a circle, while the vegetable space is a formed by a square and half square to form a rectangle.
Using strong shapes such as these can help bring a sense of unity to your work.
Dissect a circle and use individual parts in a design. Half and quarter circles etc.
Extend diameter and extend tangential line to create another strong shape.
The square can be divided and subdivided on the angle to provide even more shapes to work with.
Here are some designs based on a square or part thereof.
Here we combine circles, parts of circles and arcs, squares joined to form rectangles to create a design.