Math Review Gr. 6-8
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Area | The measure (usually in square units) of the interior region of a two-dimensional figure
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| Center of Rotation | A fixed point around which a geometric figure is rotated or turned.
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| Circumference | The distance around a circle
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| Circumference | Formula: 2 π r or π d
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| Coefficient | A numerical factor in a term containing variables
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| Coefficient | 3xy2 : 2 is an exponent; x and y are variables, 3 is a ______________________
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| Common factor | An integer that is a factor of two or more numbers
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| Complementary angles | Any two angles such that the sum of their measures equals 90 degrees.
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| Composite number | Any whole number with more than two factors
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| Cone | A three-dimensional figure that consists of a circular face (the base), a point not in the plane of the base (the vertex), and a lateral surface that connects the vertex to each point on the boundary of the base
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| Congruent figures | Two or more geometric figures that have the same size and shape
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| Decagon | A polygon with 10 sides
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| Diagonal | A line segment between non-consecutive vertices in a polygon
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| Diameter | A cord that contains the center of a circle
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| Equilateral triangle | A triangle with three congruent sides and three congruent angles;each angle measures 60º
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| Equivalent | Equal in value
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| Formula | An equation that shows the relationship between two or more quantities
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| Greatest Common Factor | The greatest number that is a factor of two or more numbers
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| Heptagon | A polygon with 7 sides
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| Hexagon | A polygon with 6 sides
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| Hypotenuse | In any right triangle, the side opposite the right angle
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| Inequality | A mathematical sentence that compares two expressions that may or may not be equivalent; uses one of these symbols ≠, ≤, ≥, <, >
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| Integer | The set of whole numbers and their opposites{… -3, -2, -1, 0, 1, 2 …}
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| Irrational Number | A number that cannot be written as the ratio of two integers; when written as a decimal, the digits neither terminate nor repeat
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| isosceles triangle | A triangle with at least two congruent sides
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| Least Common Multiple | The smallest non-zero number that is a multiple of two or more numbers
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| Mean | A measure of central tendency which is affected by all data points (with the possible exception of outliers); calculated by finding the sum of the data values and dividing by the number of data points
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| Median | A measure of central tendency that occupies the middle position of a data set in ranked order
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| Mode | A measure of central tendency that is the most frequently occurring value
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| Measures of Central Tendency | Descriptive statistics that describe the center of the data set;mean, median and mode
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| Nonagon | A polygon with 9 sides
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| Natural Numbers | The counting numbers; the positive whole numbers; a positive integer
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| Octagon | A polygon with 8 sides
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| Odd Integer | Any integer that, when divided by 2, does not have an integer as the quotient
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| Ordered pair | A pair of numbers used to locate a point in a coordinate plane; the pair is written in the form (x-coordinate, y-coordinate)
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| Origin | In a coordinate plane, the point at the intersection of the x- and y-axes;the point (0, 0)
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| Outcome | In a probability experiment, the result of an event
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| Outlier | Any value in a set of data that is notably farther from the mean than the other data
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| Parallelogram | Any quadrilateral with both pairs of opposite sides parallel
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| Pentagon | A polygon with five sides
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| Percent | Per one hundred; a special ratio in which the denominatoris always 100
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| Perfect Square | Any natural number that can be expressed as a natural number multiplied by itself such as 25 = 5 x 5
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| Perimeter | The distance around a geometric figure
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| Perpendicular Lines | Two lines that intersect to form right angles
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| Pi | The ratio of the circumference of a circle to its diameter; approximately 227; decimal approximation 3.14
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| Polygon | A simple, closed, plane figure with three or more sides that are line segments
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| Polyhedron | A three-dimensional geometric figure with polygonal faces
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| Prime Number | A natural number with exactly two factors (itself and one)
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| Proportion | A statement of equality between ratios
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| Pyramid | A polyhedron with a polygonal base, triangular faces and a vertex
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| Pythagorean Theorem | A theorem defining the relationship between the lengths of the three sides of a right triangle;a2 + b2 = c2 where a and b are the lengths of the legs of the right triangle and c is the length of the hypotenuse
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| Quadrilateral | A polygon with four sides
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| Ratio | A comparison of any two quantities; may be expressed as a : b or a to b or ab
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| Rational Numbers | The set of numbers that can be expressed as a ratio of two integers
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| Reflection | A transformation in which all points under than transformation are mirrored over a line
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| Rhombus | A parallelogram with four congruent sides
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| Sample Space | The set of all possible outcomes of an experiment
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| Scientific Notation | A standardized way of writing real numbersin the form a x (10 to a certain power)
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| Similar | Having the same shape but not necessarily the same size
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| Set | A group of numbers, variables, geometric figures or anything else
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| Supplementary Angles | Two angles with measures adding to 180º
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| Surface Area | The total area of the exterior of a three-Dimensional geometric figure; the lateral area added to the area of the base
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| Terms | Parts of an expression separated by + or - signs
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| Theoretical Probability | The ratio of the number of expected outcomes
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| Transformation | Operations that alter the location or form of a figure
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| Translation | A transformation in which a geometric figure Is moved to another location without changing its size (isometry) or orientation
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| Trapezoid | A quadrilateral with exactly one pair of parallel sides
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| Variable | A symbolic representation used to denote a quantity or expression; in mathematics, an “unknown” quantity that has the potential to change
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| Vertical Angles | Angles formed by intersecting lines.These angles have a common vertex and are congruent.
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| Volume | The total amount of space inside a three-dimensional object
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| Whole numbers | Non-negative integers
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
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If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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