It identifies the number of portions into which the whole has been divided. Diameter - A straight line from one side of a circle to the other side that passes through the center. Also the measurement of that line. The line between the numerator and the denominator of a fraction. Formula - An equation that follows a rule.
Formulas contain variables that when replaced by numbers, allow unknown quantities to be found.
Fraction - A number that expressed a portion of a whole. The denominator of a fraction represents the number of the portions the whole has been divided into, and the numerator expresses the number of the portions measured. Functions of an angle - The name of a particular ratio of the sides of a right triangle. The name of the function will depend on which side is divided into which side. There are six possible ways to divide the sides of a right triangle into each other.