Angles
an angle whose measure is greater than 0° but less than 90°
acute angle
simplify expressions by adding or subtracting like terms
combine like terms
average of data set (sum of data divided by the number of data points)
mean
entire set of items from which data can be selected
population
two numbers that when multiplied together equal 1
multiplicative inverse
sum of their angle measures is equal to 90°
complementary angles
number that is multiplied by a variable in an algebraic expression
coefficient
order numbers least to greatest then fnd the middle value (if 2 middle values, fnd average of both)
median
original amount of money originally invested
principal
largest factor that two or more number or terms have in common
greatest common factor
two angles that share a common vertex and a common side
adjacent angles
mathematical sentence that is created by placing an equals sign between two expressions
equation
in a data set, this is the value(s) that occur most often
mode
measure of the likelihood that an event will occur
probability
mathematical sentence that is created by placing an equals sign between two expressions
equation
angles that have the same relative positions in geometric fgures
corresponding angles
requires that two inverse operations be performed in order to isolate the variable
two-step equation
average of the absolute values of the deviations of each data value from the mean
mean absolute deviation (MAD)
equation that states that two ratios are equal
proportion
new amount is greater than the original amount. It is a ratio of the amount of increase to the original amount
percent increase
sum of their angles that measure is equal to 180°
supplementary angles
A mathematical sentence built from expressions using one or more of the symbols <, >, d, or e
inequality
a(b+c) = ab + ac
distributive property
ratio of the circumference of a circle to its diameter
pi
two nonadjacent congruent angles that are formed by two intersecting lines
vertical angles