crct review math you are going to do great!!!. place value
TRANSCRIPT
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 a coordinate 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 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.
MULTIPLES• multiple
• The product of a given whole number and another whole number
Example:
percent
• The ratio of a number to 100; percent means "per hundred
measure of central tendency
• A measure used to describe data; the mean, median, and mode are measures of central tendency.
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
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.
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.
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.
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 factors
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,
composite number
• A whole number that has more than two factors
• Example: 21: 1, 3, 7, 21
• Example: 4: 1, 2, 4
parallel lines
• Lines in a plane that never intersect
perpendicular lines
• Two lines that intersect to form four right 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
similar figures Figures with the same shape but not necessarily the same size
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
FACE
• A polygon that is a flat surface of a solid figure
Right Triangle• A RIGHT triangle has ONE right angle.
obtuse triangle
A triangle that has one obtuse angle
Example:
Acute Triangle
• An ACUTE triangle has THREE acute angles.
• The ratio of the circumference of a circle to its diameter
circumference The distance around a circle
Example:
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 with • 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:
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.
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
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 rectangles
pyramid
• A solid figure with a polygon base and all other faces triangles that meet at a common vertex
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)
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
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