CRCT REVIEW MATH You are going to do great!!!

PLACE VALUE

ORDERED PAIR (1,2) A pair of numbers used to locate a point on apoint coordinate planecoordinate plane; the first number tells how far to move horizontally and the second number tells how far to move vertically

relation A set of ordered pairsordered pairs Example: (5,1) (10,2) (15,3) (20,4) (25,5)

GREATEST COMMON FACTOR The greatest factor that two or more numbers have in common Example: 18: 1, 2, 3, 6, 9, 18 30: 1, 2, 3, 5, 6, 10, 15, 30 6 is the GCF of 18 and 30.factor

MULTIPLES multiple The product of a given whole number and another whole numberproductwhole number Example:

percent The ratio of a number to 100; percent means "per hundredratio

measure of central tendency A measure used to describe data; the mean, median, and mode are measures of central tendency.data meanmedianmode

mean The number found by dividing the sum of a set of numbers by the number of addends; see also average Example: 74, 91, 63, 92, 85 sumaverage

mode The numbers or items that occur most often in a set of data Example: The mode of 1, 3, 4, 4, and 6 is 4.data

median The middle number or the average of the two middle numbers in an ordered set of data Example: The median of 1, 3, 4, 6, and 7 is 4. data

range The difference between the greatest and least numbers in a set of data Example: The greatest temperature is 83°F. The least temperature is 80°F. Since = 3, the range is 3°F.differencedata

number line A line with equally spaced tick marks named by numbers (POSITIVE AND NEGATIVE INTEGERS) Example:

A number written as the product of all its prime factorsproductprimefactors

prime number A whole number greater than 1 whose only factors are 1 and itselfwhole numberfactors Example 1,2, 3, 5, Not prime 4, 8, 12,

composite number A whole number that has more than two factorswhole number factors Example: 21 : 1, 3, 7, 21 Example: 4: 1, 2, 4

parallel lines Lines in a plane that never intersectLinesplaneintersect

perpendicular lines Two lines that intersect to form four right angleslinesintersectright angles

congruent Having the same size and shape Example: The triangles are congruent.

line of symmetry A line that divides a figure into two congruent parts congruent

similar figures Figures with the same shape but not necessarily the same size

NameSidesAngles Triangle33 Quadrilateral44 Pentagon55 Hexagon66 Heptagon77 Octagon88 Nonagon99 Decagon10

FACE A polygon that is a flat surface of a solid figurepolygonsolid figure

Right Triangle A RIGHT triangle has ONE right angle.

obtuse triangle A triangle that has one obtuse angle Example: triangleobtuse angle

Acute Triangle An ACUTE triangle has THREE acute angles.

The ratio of the circumference of a circle to its diameter ratiocircumferencediameter

circumference The distance around a circle Example: circle

Diameters - A DIAMETER of a circle is a chord that contains the center of the circle. Diameter CV, diameter DT, diameter GH, diameter EU, etc.....

Radius A line segment withline segment one endpoint at the center of a circle and the other endpoint on the circle

acute angle An angle that has a measure less than a right angle (less than 90°) Example: angleright angle

Straight Angle A STRAIGHT ANGLE is one whose measure is EXACTLY 180 DEGREES. A straight angle is made up of two opposite rays. Another important fact is that a straight angle forms a straight line.

Obtuse Angle An OBTUSE ANGLE is one whose measure is GREATER THAN 90 AND LESS THAN 180 DEGREES.

Right Angle A RIGHT ANGLE is an angle whose measure is EXACTLY 90 DEGRRES. Right angles are denoted by a small square in its interior.

VERTEX - The common point for both rays is called the Vertex.

Identify the Triangles Triangles are also classified according to their length. Scalene Triangle- no congruent sides Isosceles Triangle- two congruent sides Equilateral Triangle- three congruent sides

area The number of square units needed to cover a surface Example: The area is 9 square units.square units

Perimeter The distance around a figure 2 cm + 3 cm + 3 cm = 8 cm The perimeter of this figure is 8 centimeters

VOLUME The measure of the amount of space a solid figure occupies solid figure The volume of this figure is 24 cubic units

PRISM A solid figure that has two congruent, polygon-shaped bases, and other faces that are all rectanglessolid figurecongruent polygonbasesfacesrectangles

pyramid A solid figure with a polygon base and all other faces triangles that meet at a common vertexsolid figurepolygonbasefacestrianglesvertex

Associative Property The property that states that the way addends are grouped or factors are grouped does not change the sum or the productsum product 12 + (5 + 9) = (12 + 5) + 9 (9 x 8) x 3 = 9 x (8 x 3)

Commutative Property The property that states that when the order of addends or factors is changed, the sum or product is the samefactorssumproduct = x 3 = 3 x 6

greater than (>) A symbol used to compare two numbers, with the greater number given first Example: 8 > 6 8 is greater than 6.

FRACTION A number that names a part of a whole or a part of a group