MATH 4

• Polygon


  The union of three or more coplanar segments that intersect at their endpoints
• Convex polygon


  • Diagonals lie in the interior of the polygon
• Diagonal

  A segment joining two nonconsecutive vertices
• Regular polygon


  • Convex polygon that is equiangular and equilateral
• Parallel lines


  Coplanar, non-intersecting lines
• Skew lines


  Noncoplanar, non-intersecting lines
• Quadrilateral


  A convex polygon with four sides
• Types of quadrilaterals

  • General quadrilateral
  • Parallelogram
  • Rectangle
  • Square
  • Rhombus
  • Trapezoid
  • Isosceles trapezoid
• Parallelogram


  A quadrilateral with two pairs of opposite sides that are parallel
• Rectangle


  A parallelogram with a right angle
• Square


  A rectangle with four congruent sides
• Rhombus


  A parallelogram with four congruent sides
• Trapezoid


  A quadrilateral with one pair of opposite sides parallel
• Isosceles trapezoid


  A trapezoid whose nonparallel sides are congruent
• Circle


  A set of all points in a plane
• Radius


  A line segment whose end points are the center of the circle
• Congruent circles


  • Have equal radii
• Concentric circles


  Circles with a common center
• Chord


  A segment whose endpoints are points on the circle
• Diameter


  A chord that contains the center of a circle
• Inscribed polygon


  A polygon whose vertices are on the circle
• Statistics


  Deals with the collection, organization, analysis, and interpretation of numerical data
• Descriptive statistics


  Deals primarily with the collection and organization of data
• Inferential statistics


  Deals with making inferences or conclusions about a population based on the findings of the study conducted on a sample
• Population


  A collection of all possible individuals, objects, or measurements of interest
• Discrete data


  Data obtained through counting
• Continuous data


  Data that are the result of measurement
• Cumulative frequency distribution


  Provides information about the number or percentage of values greater than or less than a specified value
• Corollary


  A statement which can be proven by using a previously proved theorem
• Sum of a triangle is 180 degrees
• Array


  The arrangement of observations in either increasing or decreasing order
• Range


  The difference between the highest and the lowest score
• Mean


  The sum of all values divided by the total frequency
• Median


  The middle value in an ordered arrangement of data
• Mode


  The most frequently appearing value in a given set of data