A dodecahedron is a polyhedron with twelve flat faces. The most common type is the regular dodecahedron made up of 12 regular pentagons, which is one of the five Platonic solids.
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A dodecagon is a flat shape with twelve sides and twelve angles, and each interior angle of a regular dodecagon is 150 degrees.
A decagon is a polygon with 10 sides and 10 vertices, with an interior angle sum of 1440 degrees and a total of 35 diagonals.
Biologists are scientists who study life phenomena, and they are divided into fields like zoology, botany, and microbiology.
(Social problem) is one of the important areas of sociological research. It affects the healthy lives of society members, hinders social harmony, and is a social disorder phenomenon that catches widespread public attention.
An upper bound refers to a number that is greater than or equal to all elements, while a lower bound is a number that is less than or equal to all elements. They are used to describe the boundary of a set or the range of a function's values.
It’s a statistical chart in a Cartesian coordinate system that uses the distribution of sample data points (xi, yi) to visually show the relationship between two continuous variables.
Basic concepts of 3D graphics: 3D graphics are solid figures in three-dimensional space that have length, width, and height, with volume and surface area.
The mathematical core of 3D images is simulating a three-dimensional space with length, width, and height (x, y, z) on a 2D plane through coordinate transformations and projection algorithms. Essentially, it's about mapping 3D geometric data onto a 2D screen.
The three-view drawing is an orthographic engineering drawing used in the engineering world to show the geometric shape of an object. It mainly reflects the object's length, width, and height through three basic views: the front view, top view, and left view.