Adjacent angles in a quadrilateral are the two angles that share a side. The feature of adjacent angles is that their sum equals 180 degrees. For any quadrilateral, whether it's a rectangle, square, or parallelogram, the sum of adjacent angles is always 180 degrees.
Rounding is a way to adjust numbers. The rule is if the last digit is 4 or less, you just drop it; if it's 5 or more, you round up.
It refers to the mathematical concept of describing a system through the relationship between inputs and outputs.
Four-dimensional geometry mainly studies the four-dimensional Euclidean space of pure spatial dimensions. It's made up of four mutually perpendicular spatial axes and is an abstract mathematical model. This is basically different from the 'three spatial dimensions plus one time dimension' concept of four-dimensional spacetime we hear about in relativity—the former is purely a geometric structure, while the latter is a physical spacetime model.
A tree diagram, also called a branching diagram or tree chart, is a graphical representation of a data tree that organizes objects in a parent-child hierarchy. It's a type of hierarchical chart that uses nodes and branches to show data levels and relationships.
In physics, speed is used to show how fast an object is moving; the bigger the number, the faster it moves.
Numbers can mainly be divided into natural numbers, integers, rational numbers, irrational numbers, real numbers, and complex numbers.
The rate of change is the core concept that describes how fast a certain quantity changes over time, space, or other variables.