Let's start with the basic shapes: spheres, cylinders, cones, and rectangular prisms. These are the building blocks of composite solids, and you need to know how to calculate their volumes and surface areas. Don't worry, it's not as hard as it sounds - just remember the formulas and you'll be golden!
For example, the volume of a sphere is given by the formula V = (4/3)πr^3, where r is the radius of the sphere. Easy peasy, right? Now, let's move on to the cylinder, which has a volume of V = πr^2h, where r is the radius and h is the height.