Basic terms:
* Addend: A number that is added to another number.
* Algebra: A branch of mathematics dealing with symbols and the rules for manipulating them.
* Angle: The space between two intersecting lines or surfaces.
* Area: The amount of surface covered by a two-dimensional shape.
* Average: The sum of a set of numbers divided by the number of numbers in the set.
* Axis: A line that divides a coordinate plane into quadrants.
More advanced terms:
* Absolute value: The distance of a number from zero.
* Algorithm: A step-by-step procedure for solving a problem.
* Arithmetic: The branch of mathematics dealing with numbers and operations.
* Asymptote: A line that a curve approaches as it extends infinitely.
* Associative property: A property of some operations where the order of grouping does not affect the result.
Other terms:
* Acute: An angle that is less than 90 degrees.
* Adjacent: Two angles that share a common side and vertex.
* Altitude: A perpendicular line segment from a vertex to the opposite side of a triangle.
* Analysis: The study of the properties of functions and other mathematical objects.
* Approximate: To estimate the value of something.
* Arc: A portion of the circumference of a circle.
This is just a starting point, and there are many other math words that begin with the letter "A."
