ELI5: Explain Like I'm 5

Solid geometry

Solid geometry is a type of math that deals with shapes that are three-dimensional, which means they have height, width, and depth. If we imagine a square, it only has height and width. But if we add another dimension to it, we get a cube which has height, width, and depth.

What this means is that solid geometry deals with shapes that not only have an area but also have a volume. For example, a cube is a solid shape that has a certain amount of space inside it, which is called its volume.

There are many different shapes in solid geometry, including cubes, spheres, pyramids, cylinders, and cones. Each of these shapes has its own unique properties, such as how many sides it has, how many vertices (corners) it has, and what its surface area and volume are.

Solid geometry is important because it helps us understand real-world objects that are three-dimensional, such as buildings, cars, and even the earth itself. By using solid geometry, we can calculate the volume and surface area of these objects, which can be useful in many different fields, from construction to engineering to medicine.
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