Question Answer
2 pairs of parallel sides parallelogram
1 pair of parallel sides trapezoid
0 parallel sides trapezium
a parallelogram with 4 congruent sides rhombus
a parallelogram with 4 congruent angles rectangle

Number and Operations- Fractions

Term Definition
fraction A fraction is a part of a whole.
equivalent fractions Fractions whose numerators and denominators are in the same ratio respectively. All equivalent fractions can be reduced to the same simple fraction.
addition Join or put together two or more quantities.
sum The total amount after addition of numbers.
subtraction To take one number away from another.
difference The result of subtracting one number from another
unlike denominator Two fractions where denominators are not identical or similar.
denominator The divisor of a fraction. The "bottom" number in a fraction that shows how many equal parts the item is divided into.
numerator The top number in a fraction.
benchmark fraction Common fractions that you can judge other numbers against.
estimate Approximate calculation or round the number to the nearest place value.
mixed numbers A number that is made up of a whole number and a fraction.
multiplication The basic idea of multiplication is repeated addition.
division The opposite operation of multiplication that separates items or values into equal parts, with or without a remainder
product The answer when two or more numbers are multiplied together.
quotient The answer after you divide one number by another

dividend ? divisor = quotient

partition Divide a whole into equal parts.
equal parts Division resulting in identical parts. Having the same portion, division, piece, or segment of a whole.
factor Factors are numbers you can multiply together to get another number:

Example: 2 and 3 are factors of 6, because 2 ? 3 = 6.

unit fraction A fraction where the top number (the "numerator") is 1
area The size of a surface.

The amount of space inside the boundary of a flat (2-dimensional) object such as a triangle or circle.

side lengths The measure of the segment joining two adjacent vertices in a figure.
scaling Act of measuring or arranging or adjusting according to a scale.

Probability Vocabulary

Term Definition
Outcome A possible result of a situation or experiment.
Event One or more outcomes together
Sample Space The set of all possible outcomes
Experimental Probability The likelihood of an event occurring based on the results of an experiment.
Theoretical Probability The likelihood of an event occurring based only on the situation, not on the results of an experiment.
Complement of an Event All possible outcomes that are not part of an event.
Frequency Table A data display that shows how often an item appears in a category.
Relative Frequency The ratio of a frequency over the total frequency.
Set A collection of elements where order doesn't matter.
Subset If all elements of set A are in set B, then set A is called this.
Venn Diagram A visual representation of sets and subsets
Two-way Frequency Table This displays data in two different sets of categories.
Conditional Probability The likelihood that an event will occur, given that another event has already occurred.
Union This includes all elements in one set or the other.
Intersection This includes only the elements in common between one set and another.
Compound Event An event that is made up of two or more events.
Independent Events Events that do not affect how each other occurs.
Dependent Events Events where one affects how the other occurs.
Mutually Exclusive Events Events that cannot happen at the same time.
Overlapping Events Events that can happen at the same time.
Tree Diagram A diagram that has a branching structure resembling a tree.
Permutation A selection of items where order matters.
Combination A selection of items where order doesn't matter.
Geometric Probability The likelihood that a random point will be on a segment or region in a plane.

4th grade geometry

Question Answer
A closed flat shape with straight sides. Polygon
Any four sided polygon. Quadrilateral
A closed, curved shape in which all points on the shape are the same distance from its center. Circle
A polygon with ten sides. decagon
A triangle in which all sides are the same length and all angles are the same measure. Equilateral triangle

A polygon with six sides Hexagon
A triangle with at least two sides of equal length and two angles of equal measure. Isosceles
A polygon with eight sides octagon
A polygon with five sides pentagon
A quadrilateral that has two pairs of parallel sides Parallelogram
A quadrilateral that has four right angles Rectangle
A polygon in which all sides have equal lengths and all angles have equal measures. Regular Polygon
A triangle whose largest angle measures 90 degrees. Right Triangle
A triangle with three sides of different lengths Scalene triangle

Revision of the basics

Question Answer
The denominator is the number at the bottom of the fraction ( d=down)
The numerator is the number at the top of a fraction
The vinculum is the line between the top ( numerator) and bottom ( denominator)
A mixed number is made up of a whole number and a fraction = 1 & 1/2
A proper fraction is where the smaller number is on the top
An improper fraction is where the larger number is on the top
A denominator tells us how many parts it is evenly broken up into
An equivalent fraction is a fraction that has the same value but is made up of different sizes
A simplified fraction is a fraction in it's easiest, smallest size to use = 8/16 = 1/2, 6/9 = 2/3
Rule: what you do to the top- do to the bottom
Rule: what you do to the bottom- do to the top
In addition and subtraction of fractions the denominators must always be the same
Multiplying fractions are easy- the rule is top by top, bottom by bottom
How do we make denominators the same? times them by each other- or- see what number they will both go into
What's a multiple? A number that a number can be multiplied into
What's a factor? A number that goes into another number evenly
what is the opposite (or inverse) of the fraction 7/8? 8/7

Terms from Unit 7(Sections 7.1-7.3 & 7.5)

Question Answer
__ are polygons that have corresponding, proportional sides and corresponding, congruent angles. Similar polygons
Two figures that have the same shape and same size are known to be __. Congruent
True/False: When writing the side ratios, the image goes over the preimage. True
__ is the original figure. preimage
Circle the correct term: Congruent figures are always / sometimes / never similar. always
A comparison of two quantities by division is called a(n) __. ratio
The resulting figure is called __. image
When two ratios are equal, it is known as a(n) __. proportion
The first and the last numbers in a proportion are called the __. Extremes
When three or more ratios are equal, it is called a(n) __. extended proportion
__ is a drawing where all the lengths are proportional to their corresponding actual lengths. scale drawing
True/False: A figure undergoes a reduction when the scale factor is greater than one. False
A ratio that compares each length in the scale drawing to the actual length is known as a(n) __. Scale
True/False: The scale factor can be negative. False
Circle the correct term: Translation / Rotation is known as a slide. Translation
Circle the correct term: Reflection / Dilation is a similar transformation. Dilation


Term Definition
absolute value It is the distance of a number from zero on a number line.
acute angle It is an angle that has a measure less than a right angle.
acute triangle It is a triangle that has three acute angles.
addends It is numbers that are added in an addition problem.
addition It is the process of finding the total number of items when two or more groups of items are joined; the opposite of subtraction
area It is the number of square units needed to cover
arrangement It is an ordering of items.
array It is an arrangement of objects in rows and columns.
Associative Property of Addition It is the property that states that when the grouping of addends is changed, the sum is the same.
Associative Property of Multiplication It is the property that states that the way factors are grouped does not change the product.
average It is a visual mean.
axis It is the horizontal or vertical number line used in a graph or coordinate plane.


Term Definition
bar graph It is a graph that uses horizontal or vertical bars to display countable data.
base 1. It is a number used as a repeated factor
2. It is a polygon's side or solid figure's face by which the figure is measured or named
benchmark It is a familiar number used as a point of reference
billion 1,000,000,000


Term Definition
capacity It is a amount a container can hold.
Celsius It is a metric scale for measuring temperature
centimeter It is a unit for measuring length in the metric system
central angle It is the angle formed by two radii of a circle that meet at its center
certain It might happen.
chord It is a line segment with endpoints on a circle.
circle It is a closed figure with all points on the figure the same distance from the center point.
circle graph It is a graph that shows how parts of the data are related to the whole and to each other.
circumference It is the distance around a circle .
combination It is a choice in which the order of items does not matter.
common factor It is a number that is a factor of two or more numbers
common multiple It is a number that is a multiple of two or more numbers
Commutative Property of Addition It is the property that states that when the order of two addends is changed, the sum is the same.
Commutative Property of Multiplication It is the property that states that when the order of two factors is changed, the property is the same.
compass It is a tool used to construct circles and arcs
compatible numbers It has multiple numbers that are easy to compute mentally.
compensation It is an estimation strategy in which you change one addend to a multiple of ten and then adjust