Terms related to basic Maths:
A mathematical expression meaning very large in magnitude or distance. It is so large that it cannot be measured. It is given the symbol ¥ .
Is Proportional to
The statement that a is proportionl to b (a a b) means that a = (some constant) x b. For example, the dollars you earn in a week (straight rate) are proportional to the hours you work, with the constant being the dollars per hour you earn.
Approximately Equal to
An expression indicating a value which is not exact, but rather close to the value. It is given the symbol ».
This expression means that two objects are at right angles (form a 90-degree angle) to each other. It is given the symbol ^.
Two lines extending in the same direction which are everywhere equidistant and not meeting. It is given the symbol.