Curvilinear shapes are shapes formed entirely from curved lines. Traditional shapes such as the circle and the oval are examples of curvilinear shapes. Alternatively, any sort of shape that has a continuous curved outline can be classed as a curvilinear shape, no matter how unsophisticated it is. Curvilinear shapes could be considered to be the 'opposite' of polygons, which are shapes that consist of entirely straight edges.

- Do curvilinear shapes truly exist?

- Geometry: Learning about shapes