Cartesian coordinates are a math tool used to determine the position of points with numbers, usually referring to the rectangular coordinate system. It was created by the French mathematician Descartes, and the main idea is to link geometric shapes with algebraic equations, making calculations easier.

The angles in a polygon mainly include two key concepts: interior angles and exterior angles.

Electromagnetism is an important branch of physics that studies electric charges, currents, electric fields, magnetic fields, and how they interact. Its core theoretical framework is described by Maxwell's equations and it’s widely used in everything from power systems to modern communications.

A polyhedron usually refers to a solid figure in math that's made up of polygons.

If 'survey' refers to a statistical method (like sampling surveys), then it falls under a specific term in applied statistics.

A quadratic equation is a polynomial equation where the highest power of the unknown is 2. If it has only one unknown, it's called a single-variable quadratic equation; if it has two, it's called a two-variable quadratic equation. The main focus is on finding the roots of the equation and analyzing their properties.

A questionnaire survey refers to a method where you create a detailed and thorough questionnaire and ask respondents to answer it to collect information.

A 'quadratic graph' usually refers to the graph of a quadratic function, which is shaped like a parabola. This is an important topic in middle school math and is mainly used to describe the curved relationship between variables.

"Vertex" has different meanings in math depending on the context, but the core idea is a 'point of intersection' or an 'extreme point'.

Binary is a method of counting using just the digits 0 and 1, with the rule of carrying over when reaching two. Computers basically operate using this system.