Sat math Essentials

like terms
two or more terms that contain the exact same variables
–
G L O S S A R Y
–
2 4 6

---

line
a straight path that continues infinitely in two directions. The geometric notation for a line through points
A and B is 
AB
.
line segment
the part of a line between (and including) two points. The geometric notation for the line segment
joining points A and B is 
A
B
. The notation 
A
B
is used both to refer to the segment itself and to its length.
major arc
an arc greater than or equal to 180°
matrix
a rectangular array of numbers
mean
the quantity found by adding all the numbers in a set and dividing the sum by the number of addends; also
known as the 
average
median
the middle number in a set of numbers arranged from least to greatest
midpoint
the point at the exact middle of a line segment
minor arc
an arc less than or equal to 180°
mode
the number that occurs most frequently in a set of numbers
monomial
a polynomial with one term, such as 5
b
6
multiple
a number that can be obtained by multiplying a number 
x
by a whole number 
negative number
a number less than zero
numerator
the top number in a fraction. 3 is the numerator of
3
7
.
obtuse angle
an angle that measures greater than 90°
obtuse triangle
a triangle with an angle that measures greater than 90°
odd number
a number that cannot be divided evenly by the number 2 
order of operations
the specific order to follow when calculating multiple operations: parentheses, exponents,
multiply/divide, add/subtract
ordered pair
a location of a point on the coordinate plane in the form of (
x,y
). The 
x
represents the location of
the point on the horizontal 
x
-axis, and the 
y
represents the location of the point on the vertical 
y
-axis.
origin
coordinate point (0,0): the point on a coordinate plane at which the 
x
-axis and 
y
-axis intersect