To simplify the form of (an expression, such as a fraction) without changing the value.

A fraction in which the numerator is greater than or equal to the denominator

The distance around a circle

A straight line passing from side to side through the center of a circle or sphere.

A straight line from the center to the circumference of a circle or sphere.

an angle that is less than 90 degrees

An angle between 90 and 180 degrees

an instrument used for drawing circles, measuring distances, etc

A part of a line, with one endpoint, that continues without end in one direction

is a single point where two lines meet or cross each other

Changing the grouping of numbers will NOT change the value. For example: (7 + 4) + 8 = 7 + (4 + 8) also works with multiplication

the sum of any number and zero is the original number

a x 1 = a, If you multiply a number by one, the product is the same

The property that says that two or more numbers can be added or multiplied in any order without changing the result. ex. 12+6 = 6+12