acute triangle

a triangle whose interior angles are all acute

algebraic sentence

Math problem where letters represent numbers.

arc

something curved in shape

arithmetic progression

(mathematics) a progression in which a constant is added to each term in order to obtain the next term

chord

line segment whose endpoints are any two points on a circle

congruent side

sides of a polygon with exactly the same length

convert

to change

corresponding angle

angles that are in the same position;made by a transversal cutting through two other lines

corresponding side

sides that have the same relative position in similar shapes

cross-section area

measure of the size of a surface region that would be exposed by making a straight cut through something, esp. at right angles to an axis

data point

an item of factual information derived from measurement or research

discount

the act of reducing the selling price of merchandise

ellipse

a closed plane curve resulting from the intersection of a circular cone and a plane cutting completely through it

equality

the quality of being the same in quantity or measure or value or status

expanded notation

A way of writing numbers in which the numbers are written to show the place value of each digit (639 = 600 + 30 + 9)

exponent

a mathematical notation indicating the number of times a quantity is multiplied by itself

half hour

30 minutes

horizontal

Going straight across from side to side

interior angle

the angle inside two adjacent sides of a polygon

interval

the difference between two numbers on the scale

lower quartile

25% quartile. The median of the lower data values in order.

outlier

Any data point that sticks out. NOT all data sets have one.

parabola

a U shaped line on a graph

percentile

A point on the distributionbelow with a certain % of scores fall. Ex: Scored in the 99th percentile = only 1% scored higher than you

power

a mathematical notation indicating the number of times a quantity is multiplied by itself

quadrupled

Increases by four times

range

the difference between the highest and lowest scores in a distribution

right angle

the 90 degree angle between two perpendicular lines

sample

a small part of something intended as representative of the whole

scale factor

a number used as a multiplier in scaling

scientific notation

A method of writing or displaying numbers in terms of a decimal number between 1 and 10 multiplied by a power of 10.

secant

a line that intersects a circle in two points

slope

the steepness of a line on a graph, equal to its vertical change divided by its horizontal change

square pyramid

a solid figure with a square base and four faces that are triangles

successive

following in order

tangent

a line that intersects a circle at exactly one point

tax

charge against a citizen's person or property or activity for the support of government

tenth power

using one number as a factor ten times; 10^10=10000000000

tessellation

A pattern that covers a plane by transforming the same figure or set of figures so that there are no overlapping or empty spaces

tripled

multiplying by three

vertical

Straight up and down

vector

a quantity that has both size and direction