# Math Vocablary for Final

## Terms

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- perfect square
- a number whose square root is an interger
- surface area
- the sum of the areas of all the faces of a solid figure
- perimeter
- the measurement of the distance around a figure
- rhombus
- a parallelogram with all sides congruent and opposite angles congruent
- mean
- the average of a set of numbers
- plane
- a flat surface that extends indefinitely in all directions
- rational number
- a number that can be written in fractional form a/b where a and b are intergers and b does not equal 0.
- obtuse angle
- an angle measuring greater than 90º but less than 180º
- inverse relationships
- opposire operations: addition and subtraction are invers relationships; multiplication and division are inverse relationships
- pythagorean theorem
- idea that states the sum of the squares of teh legs of a right triangle equals the sqaure of the hypotenuse
- inverse property
- the sum of a number anits opposite is zero. the product of a number and its recirocal is one
- parrallelogram
- a quadrilateral with two pairs of parallel sides
- cone
- a solid figure having one cirvular base and a curved surface
- line
- a set of points in oder extending idefinitely in opposite directions
- angle
- two rays with a common endpoint, called the vertex
- irrational number
- a number that cannot be expressed as a rational number in the form a/b, where b doesnt equal 0. as a decimal it is a nonrepeating, nontermination decimal
- circumference
- the distance around, or the perimeter of, a circle
- edge
- the line segment formed by the intersection of two faces of a polyhedron
- exponent
- a number that tells how many times the base is to be used as a factor
- volume
- the number od cubic units of space a figure contains
- identity element of addition
- zero is the identity element in addition because adding zero to a number does not change its value
- line of symnetry
- a line that divides a figure into two conguent parts
- parallel lines
- lines in a plane that never intersect
- isosceles triangle
- a triangle having two opposite sides and two opposite angles congruent
- pi
- the ratio of the circumference to the diameter of any circle
- area
- the number of square units a region contains
- quotient
- the answer that results from the division of the dividend by the divisor
- cylinder
- a soild figure having two parrallel, congrunt, circular bases and a cuved surface
- vertical angles
- opposite angles formed by two intersecting lines
- scalene triangle
- a triangle with no congruent sides
- variable
- a letter of the alphabet that stands for a number value in a mathematical expression or equation
- GCF
- the greatest factor that is common to two or more numbers
- polygon
- a simple closed figure with sides that are lone segments
- decameter
- a unit of length in the metric system that is equal to 10 meters
- ratio
- a comparison of two numbers by division
- kilo
- a prefix meanig thousand
- rectangle
- a quadrilateral with all angles congruent and two pairs of congruent sides
- composite number
- a whole number greater than 1 hat has more thantwo factors
- conguent figures
- figues having the same size and shape
- faces
- the sides make up a solid figure
- bisect
- to divide a segment or an angle into two congruent parts
- radius
- a segment from the center of a circle to a point onthe circle
- perpendicular lines
- lines in a plane that intersect to form right angles
- origin
- the point (0,0) in the coordinate plane where the x-axis and the y-axis intersect
- identity element of multiplication
- one is the identity element in multiplication because multiplying a number by 1 does not change its value
- multiple
- the product of a given number and any whole number
- alternate interior angles
- opposite angels that are inside of parallel lines
- order of operations
- the order in which mathematical operations must be done when more than one operation is involved
- median
- the middle number is a set os numers arraged in order. If there is an even number of entries, the edin is the average of teh two numbers in the middle
- dividend
- the number to be divided
- circle
- a closed plae figure all of whose points are equidistant from a point within called the center
- square root
- a number which when multiplied by itself give the orginal number
- mode
- the number that appears most frequently in a set of numbers
- quadrant
- one of four sctions into which the coordinate plane is divided
- ray
- part of a line with one endpoint
- alternate exterior angles
- opposite angles that are outside of parallel lines
- mixed number
- a number having a whole number part and a fractoin part
- supplementary angle
- two angles the sum of whose measures is 180
- factor
- one of the two or more numbers taht are miltiplied to orm a ptoduct
- divisor
- the number by which the dividend is divided
- LCM
- the least number other than 0 that is a common multiple of two or more numbers
- equilateral triangle
- a triangle with three congruent sides
- decimal
- a numeral taht includes a decimal point, which separates the ones place from the tenths place
- distributive property of multiplication over addition
- the poduct of a factor times a sum can be written as teh sum of the two products
- percent
- the ratio or comparison of a number to one hundred
- diameter
- a segment passing through the center os a circle with both endpoints on the circle
- cube
- a rectangular prism with six congruent faces
- prime number
- a whole number greater than 1 that has only two factors
- evaluate
- replace the variable with a nmber, then simplify
- hypotenuse
- the sde opposite the right angle in a right triangle
- regular polygon
- a polygon having all sides and angles congruent
- range
- the given measure plus or minus the greatest possible error
- denomiator
- names the total number of cgruent or equal parts
- complementary angles
- two angles the sum of whose measure is 90º