The incline of a playground slide depends on many factors, including the height of the starting point and the preferences of the users. For lower straight and wavy models, we use a slide inclination within the range of 38 to 40 degrees, while brachistochrone models have up to 60-degree inclines on some sections, allowing for fast yet safe rides. However, the final decision on the angle of inclination should be based on the specific conditions prevailing at the installation site.