The sine and cosine theorems are collectively called the sine theorem and the cosine theorem. They're the core set of theorems about the relationships between the sides and angles of triangles, used to solve triangle geometry problems.
The expansion method refers to a mathematical approach where complex expressions or objects are broken down into simpler, basic parts to make calculations, analysis, or research easier.
Positive correlation means when one variable goes up, the other one goes up too.
Expanding and factoring are two inverse operations in algebra, with the main difference being the direction of the structural transformation.
You could also say that natural numbers, except for 0, are positive integers.
A development is the process of unfolding a geometric shape into a flat figure according to certain rules. When making a development, you need to pay attention to how the faces of the shape are connected and positioned relative to each other, and whether the unfolded figure can fully cover all the faces of the shape.
Its core definition is the measurement of one-dimensional space, indicating the distance from point to point.
A right angle is an angle that is exactly 90 degrees, and it's the standard in math for comparing other angles.