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31 Cards in this Set

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Absolute Value
The distance between a number and zero on the number line.
The symbol for absolute value is shown in this equation |-8| = 8
Associative Property
In addition or multiplication, the result of the expression will remain the same regardless of grouping.
Example: a + (b + c) = (a + b) + c;
a(bc) = (ab)c
Commutative Property
The sum or product of numbers is the same no matter how the numbers are arranged.
Example: a + b = b + a; ab = ba
Distributive Property
The sum of two addends multiplied by a number will be the sum of the product of each addend and the number.
Example: a(b+c)= ab + ac
Integers
The set of whole numbers and their opposites {...-3,-2,-1,0,1,2,3,...}
Natural Numbers
The set of numbers {1,2,3,4,...}. Natural numbers are also called counting numbers.
Negative Numbers
The set of numbers less than zero.
Opposite Numbers
Two different numbers that have the same absolute value.
Example: 4 and -4 are opposite numbers because they both have an absolute value of 4.
Positive Numbers
The set of numbers greater than zero.
Rational Numbers
The set of numbers that can be written in the form a/b where a and b are integers and b ≠ 0.
Sign
A symbol that indicates whether a number is positive or negative.
Example: In -4, the (-) sign shows this number is read "negative four".
Whole Numbers
the set of all natural numbers and zero.
Point
An exact location. Represented by a dot, but has no size at all.
Line
A straight path that extends without end in opposite directions.
Plane
A perfectly flat surface that extends infinitely in all directions.
Ray
Part of a line. Has one endpoint and extends without end in one direction.
Line Segment
Part of a line or ray that extends from one endpoint to another.
Angle
Formed by two rays with a common endpoint. The two rays are the sides of the angle. The common endpoint is the vertex.
Complementary Angles
Two angles whose sums added together equal 90 degrees.
Supplementary Angles
Two angles whose sums total 180 degrees.
Perpendicular Lines
Two intersecting lines whose angles measure 90 degrees.
Parallel Lines
Lines in the same plane that do not intersect at all.
Transformation
A change in the position or orientation of a figure. (Translation/slide, Rotation
Translation
A transformation where the figure SLIDES along a straight line without turning.
Reflection
A tranformation of a figure that FLIPS the figure across a line, creating a mirror image.
Rotation
A transformation where the figure TURNS around a fixed point.
Dilation
A transformation that changes the size, but not the shape, of a figure. After the dilation, the image of the figure is silmilar to the original figure.
Congruent
Having the same size and shape.
Congruent Angles
Angles that have the same measure.
Bisect
Divide into two congruent parts.
Coordinate Plane
A plane formed by the intersection of a horizontal number line called the x-axis and a vertical number line called the y-axis.