A B C D E F G H IJK L M N O P Q R S T U V WXYZ
Making Connections Glossary
Identity Property of Addition  
  The Identity Property of Addition states that adding zero to any expression leaves the expression unchanged.  That is, a + 0 = a.  For example, −2y + 0 = − 2y.
Identity Property of Multiplication   
  The Identity Property of Multiplication states that multiplying any expression by 1 leaves the expression unchanged.  That is, a(1) = a .  For example, 437x − 1 = 437x.
impossibility  
  An event with a probability of zero.
independent events  
  If the outcome of a probabilistic event does not affect the probability of another event, then the events are independent.  For example, assume that a normal six-sided die is being rolled twice to determine the probability of rolling a 1 twice.  The result of the first roll does not affect the probability of rolling a 1 on the second roll.  Since the probability of rolling a 1 on the first roll is pic and the probability of rolling a 1 on the second roll is also pic, then the probability of rolling two 1s in a row is pic.
inequality  
  An inequality consists of two expressions on either side of an inequality symbol.  For example, the inequality 7x + 4.2 < − 8  states that the expression 7x + 4.2  has a value less than –8.
inequality symbols  
  The symbol ≤ read from left to right means “less than or equal to,”  the symbol ≥ read from left to right means “greater than or equal to,” and the symbols < and > mean “less than” and “greater than,” respectively.  For example, “ 7 < 13” means that 7 is less than 13.
integers  
  The set of numbers {…, –3, –2, –1, 0, 1, 2, 3, …}.
intersect  
  To meet or cross.  The x-axis intersects the y-axis at the origin.  (See axis.)
interval  
  A set of numbers between two given numbers.
inverse operation  
  An operation that undoes another operation.  For example, multiplication is the inverse operation for division.
 irrational numbers 
  The set of numbers that cannot be expressed in the form pic, where  a  and  b  are integers and b ≠ 0.  For example, π and pic are irrational numbers.
 isosceles triangle  
  A triangle with two sides of equal length.

pic
iterate  
  The process of repeating a measurement many times, such as the use of a one-foot ruler to measure a long room by placing the ruler end-to-end many times.
kite  
  A quadrilateral with two distinct pairs of consecutive congruent sides.