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# RISD 4th 9 wks math

### RISD 4th 9 wks. math vocab.

termdefinition
difference the answer to a subtraction problem
product the answer to a multiplication problem
quotient the answer to a division problem
factor a number that is multiplied by another number to find a product
multiple the product of a number and any whole number
least common multiple the smallest number, other than 0, that is a common multiple of two or more numbers
greatest common factor the largest factor that two or more numbers have in common
prime number a whole number greater than one with exactly two factors, 1 and itself
composite number a whole number that has more than two whole number factors
percent the ratio of a number to 100
ratio a comparison of two quantities
squared raised to the power of 2
factor tree a diagram showing the prime factorization of a number
prime factorization a composite number expressed as the product of its prime factors
approximate to estimate or come close to
expression a mathematical combination of numbers, variables, and operations
equation a mathematical sentence stating that two expressions are equal
order of operations the process of solving math expressions (PEMDAS: parenthesis, exponents, multiplication/division left to right, addition/subtraction left to right)
median the middle number in a set of data when the data is arranged in order
mode one of the values appearing most often in a set of data
range the difference between the highest and lowest values in a set of data
mixed number a whole number plus a fraction
improper fraction a fraction whose numerator is greater than or equal to its denominator
area the number of square units needed to cover a surface (the inside of a shape)
perimeter the distance around the outside of a 2 dimensional shape
diameter a line segment that passes through the center of a circle and endpoints on the circle
radius a line segment from the center of a circle to any point on the circle
circumference the distance around a circle
parallelogram a quadrilateral with opposite sides parallel and congruent and opposite angles are congruent
rhombus a parallelogram whose four sides are congruent and whose opposite angles are congruent
triangle a 3 sided polygon; all angles equal 180 degrees
quadrilateral a 4 sided polygon; all angles equal 360 degrees
trapezoid a quadrilateral that has only one pair of parallel sides
octagon an 8 sided polygon
hexagon a 6 sided polygon
pentagon a 5 sided polygon
obtuse angle an angle with a measure of more than 90 degrees but less than 180 degrees
acute angle an angle that measures greater than zero degrees and less than 90 degrees
right angle an angle with a measure of 90 degrees
equilateral triangle a triangle with 3 equal sides
isosceles triangle a triangle with 2 congruent sides
scalene triangle a triangle with no congruent ides
vertex/vertices the point where 2 rays meet, where 2 sides of a polygon meet, or where the edges of a 3D shape meet; the top point of a cone or pyramid
Created by: sgrubb