crct review math you are going to do great!!!. place value
TRANSCRIPT
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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 83°F.The least temperature is 80°F.Since 83 - 80 = 3, the range is 3°F.
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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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Name Sides Angles
Triangle 3 3
Quadrilateral 4 4
Pentagon 5 5
Hexagon 6 6
Heptagon 7 7
Octagon 8 8
Nonagon 9 9
Decagon 10 10
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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 cm
The 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 + 9
6 x 3 = 3 x 6
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greater than (>)
A symbol used to compare two numbers, with the greater number given first
Example:
8 > 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