CRCT REVIEW

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CRCT REVIEW

• MATH
• You are going to do great!!!

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PLACE VALUE
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ORDERED PAIR

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

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relation

• A set of ordered pairs

Example (5,1)       (10,2)       (15,3)      
(20,4)       (25,5)
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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.

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MULTIPLES

• multiple
• The product of a given whole number and another
  whole number

Example                                 
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percent

• The ratio of a number to 100 percent means "per
  hundred

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measure of central tendency

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

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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

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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.

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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.

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range

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

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number line

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

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A number written as the product of all its prime
factors
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prime number

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

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composite number

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

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parallel lines

• Lines in a plane that never intersect

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perpendicular lines

• Two lines that intersect to form four right
  angles

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congruent Having the same size and shape
Example                                The
triangles are congruent.
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line of symmetry

• A line that divides a figure into two congruent
  parts

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

• A polygon that is a flat surface of a solid
  figure

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Right Triangle

• A RIGHT triangle has ONE right angle.

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obtuse triangle A triangle that has one obtuse
angle Example                               
                        
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Acute Triangle

• An ACUTE triangle has THREE acute angles.

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

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circumference The distance around a circle
Example                       
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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.....

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Radius

• A line segment with
• one endpoint
• at the center
• of a circle
• and the other
• endpoint
• on the circle

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• acute angle
• An angle that has a measure less than a right
  angle (less than 90) Example

                            
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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. 

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Obtuse Angle

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

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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.

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VERTEX -

• The common point for both rays is called the
  Vertex. 

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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

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

• The distance
• around a figure
• 2 cm 3 cm 3 cm
• 8 cmThe perimeter of this figure is 8
  centimeters

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VOLUME

• The measure of the amount of space a solid figure
  occupies

The volume of this figure is 24 cubic units
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PRISM

• A solid figure that has two congruent,
  polygon-shaped bases, and other faces that are
  all rectangles

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pyramid

• A solid figure with a polygon base and all other
  faces triangles that meet at a common vertex

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Associative Property

• The property that states that the way addends are
  grouped or factors are grouped does not change
  the sum or the product

12 (5 9) (12 5) 9 (9 x 8) x 3 9 x
(8 x 3)
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Commutative Property

• The property that states that when the order of
  addends or factors is changed, the sum or product
  is the same

9 4 4 96 x 3 3 x 6
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greater than (gt)
A symbol used to compare two numbers, with the
greater number given first Example 8 gt 6 8
is greater than 6.
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FRACTION

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

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