Geometry (Base List)

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Full list of words from this list:

words only definitions & notes
  1. acute
    (of an angle) less than 90 degrees
  2. acute angle
    an angle less than 90 degrees but more than 0 degrees
  3. adjacent
    having a common boundary or edge
  4. altitude
    the perpendicular distance from the base of a figure
  5. angle
    the space between two lines or planes that intersect
  6. arc
    a continuous portion of a circle
  7. area
    the extent of a two-dimensional surface within a boundary
  8. attribute
    a characteristic that distinguishes objects or individuals
  9. axis
    a straight line through a body or figure
  10. base
    the bottom side of a geometric figure
  11. bisect
    cut in half or cut in two
  12. category
    a collection of things sharing a common attribute
  13. center
    a point equidistant from the ends of a line
  14. chord
    a straight line connecting two points on a curve
  15. circle
    a plane curve with every point equidistant from the center
  16. circular
    having a circular shape
  17. circumference
    the length of the closed curve of a circle
  18. circumscribe
    draw a geometric figure around another figure
  19. clockwise
    in the direction that the hands of a clock move
  20. collinear
    lying on the same line
  21. compass
    drafting instrument used for drawing circles
  22. complementary angles
    two angles whose sum is a right angle
  23. compose
    form the substance of
  24. cone
    a shape with a circular base and sides tapering to a point
  25. congruent
    coinciding when superimposed
  26. conic section
    (geometry) a curve generated by the intersection of a plane and a circular cone
  27. constant of proportionality
    the constant value of the ratio of two proportional quantities x and y; usually written y = kx, where k is the factor of proportionality
  28. converse
    a proposition obtained by conversion
  29. coordinate
    a number that identifies a position relative to an axis
  30. coordinate system
    a system that uses coordinates to establish position
  31. coplanar
    lying in the same plane
  32. cosine
    ratio of the adjacent side to the hypotenuse of a right-angled triangle
  33. counterclockwise
    in a direction opposite to the direction in which the hands of a clock move
  34. cross-section
    representing a plane made by cutting across something at right angles to its length
  35. cube
    a three-dimensional figure with six equal squares as faces
  36. cubic
    having three dimensions
  37. cylinder
    a solid bounded by a round surface and two parallel planes
  38. decompose
    separate into constituent elements or parts
  39. degree
    a measure for arcs and angles
  40. derive
    reason by deduction; establish by deduction
  41. diagonal
    a straight line connecting nonadjacent vertices of a polygon
  42. diameter
    the length of a straight line through the center of a circle
  43. dimension
    the magnitude of something in a particular direction
  44. dissection
    the act of cutting so as to separate into pieces
  45. edge
    a line determining the limits of an area
  46. ellipse
    a closed plane curve with an oval shape
  47. endpoint
    a place where something ends or is complete
  48. equal
    having the same quantity, value, or measure as another
  49. equation
    a mathematical statement that two expressions are the same
  50. equidistant
    exactly as far from one point as from another
  51. equilateral triangle
    a three-sided regular polygon
  52. Euclidean geometry
    (mathematics) geometry based on Euclid's axioms
  53. exterior angle
    the supplement of an interior angle of a polygon
  54. face
    a surface forming part of the outside of an object
  55. feature
    a prominent attribute or aspect of something
  56. figure
    alternate name for the body of a human being
  57. focus
    the concentration of attention or energy on something
  58. formula
    a group of symbols that make a mathematical statement
  59. function
    what something is used for
  60. gap
    an open or empty space in or between things
  61. geometric mean
    the mean of n numbers expressed as the n-th root of their product
  62. graph
    a visual representation of the relations between quantities
  63. height
    distance from the base of something to its top
  64. hexagon
    a six-sided polygon
  65. hierarchy
    a series of ordered groupings within a system
  66. horizontal
    parallel to or in the plane of the horizon or a base line
  67. hyperbola
    an open, symmetrical plane curve with two branches
  68. hypotenuse
    the side of a right triangle opposite the right angle
  69. hypothesis
    a tentative insight that is not yet verified or tested
  70. input
    signal going into an electronic system
  71. inscribe
    carve, cut, or etch into a material or surface
  72. interior angle
    the angle inside two adjacent sides of a polygon
  73. intersect
    meet or cross at a point; overlap
  74. intersection
    the act of meeting at a point
  75. isosceles triangle
    a triangle with two equal sides
  76. length
    the linear extent in space from one end to the other
  77. line
    a length between two points
  78. measure
    determine the dimensions of something or somebody
  79. measurement
    assigning numbers to phenomena according to a rule
  80. midpoint
    a point equidistant from the ends of a line or the extremities of a figure
  81. model
    a hypothetical description of a complex entity or process
  82. obtuse
    of an angle, between 90 and 180 degrees
  83. obtuse angle
    an angle between 90 and 180 degrees
  84. octagon
    a shape with eight angles and eight sides
  85. origin
    the point of intersection of axes on a coordinate plane
  86. output
    final product; the things produced
  87. overlap
    extend over and cover a part of
  88. parabola
    a symmetrical, approximately U-shaped curve
  89. parallel
    being everywhere equidistant and not intersecting
  90. parallelogram
    a quadrilateral whose opposite sides are parallel and equal
  91. partition
    divide into parts, pieces, or sections
  92. pentagon
    a shape with five angles and five sides
  93. perimeter
    a line enclosing a plane area
  94. perpendicular
    intersecting at or forming right angles
  95. pi
    the ratio of the circumference to the diameter of a circle
  96. plane
    an unbounded two-dimensional shape
  97. plane figure
    a two-dimensional shape
  98. plane section
    the area created by a plane cutting through a solid
  99. point
    a geometric element that has position but no extension
  100. polygon
    a closed plane figure bounded by straight sides
  101. postulate
    a proposition accepted as true to provide a logical basis
  102. prism
    a polyhedron with two congruent and parallel faces
  103. proof
    a formal series of statements showing that something is true
  104. property
    a basic or essential attribute shared by members of a class
  105. proportionality
    harmonious arrangement or relation of parts or elements within a whole (as in a design)
  106. protractor
    drafting instrument used to draw or measure angles
  107. pyramid
    a polyhedron having a polygonal base and triangular sides
  108. quadrant
    any of the four areas into which a plane is divided
  109. quadrilateral
    a four-sided polygon
  110. radian
    the unit of plane angle adopted under the Systeme International d'Unites; equal to the angle at the center of a circle subtended by an arc equal in length to the radius (approximately 57.295 degrees)
  111. radius
    the length of a line between a circle's center and perimeter
  112. ratio
    relation with respect to comparative quantity or magnitude
  113. ray
    (mathematics) a straight line extending from a point
  114. rectangle
    a parallelogram with four right angles
  115. rectangular
    having four right angles
  116. rectilinear
    characterized by a straight line or lines
  117. reflection
    transformation in which the direction of an axis is reversed
  118. regular polygon
    a polygon with all sides and all angles equal
  119. rhombus
    a parallelogram with four equal sides
  120. right angle
    the 90 degree angle between two perpendicular lines
  121. right triangle
    a triangle with one right angle
  122. rotation
    a transformation in which the coordinate axes are turned
  123. scale
    the ratio between the size of a thing and its representation
  124. scale factor
    a number used as a multiplier in scaling
  125. scalene
    having three sides of different lengths
  126. scalene triangle
    a triangle with no two sides of equal length
  127. sector
    a plane figure bounded by two radii and the arc of a circle
  128. sequence
    serial arrangement in which things follow in logical order
  129. shape
    a perceptual structure
  130. side
    a line segment forming part of the perimeter of a plane figure
  131. similarity
    the quality of being alike
  132. sine
    ratio of the length of the side opposite the given angle to the length of the hypotenuse of a right-angled triangle
  133. slope
    the property of a line that departs from the horizontal
  134. solid figure
    a three-dimensional shape
  135. sphere
    a solid figure bounded by a round surface
  136. square
    a polygon with four equal sides and four right angles
  137. superposition
    (geometry) the placement of one object ideally in the position of another one in order to show that the two coincide
  138. surface area
    the extent of a 2-dimensional surface enclosed within a boundary
  139. symmetric
    having similarity in size, shape, and relative position of corresponding parts
  140. symmetrical
    having similarity in corresponding parts
  141. symmetry
    exact reflection of form on opposite sides of a line
  142. tangent
    ratio of the opposite and adjacent sides of a right triangle
  143. theorem
    a proposition deducible from basic postulates
  144. three-dimensional
    involving or relating to three dimensions or aspects
  145. tiling
    the application of tiles to cover a surface
  146. transformation
    a change in the position of a figure on a coordinate plane
  147. translation
    when the coordinate system origin moves to another position
  148. transversal
    extending or lying across
  149. trapezoid
    a quadrilateral with one pair of parallel sides
  150. triangle
    a three-sided polygon
  151. trigonometric function
    function of an angle expressed as a ratio of the length of the sides of right-angled triangle containing the angle
  152. trigonometry
    the mathematics of three-sided figures and their functions
  153. two-dimensional
    involving measurements of magnitude in two directions
  154. unit
    a division accepted as a standard of measurement or exchange
  155. value
    a numerical quantity measured or assigned or computed
  156. vertex
    the point of intersection of lines
  157. vertical
    at right angles to the plane of the horizon or a base line
  158. volume
    the amount of 3-dimensional space occupied by an object
  159. whole
    all of something, including all of its elements or parts
  160. width
    the extent of something from side to side
  161. x-axis
    the horizontal axis in a plane coordinate system
  162. y-axis
    the vertical axis in a plane coordinate system
Created on Wed Feb 08 14:18:36 EST 2017 (updated Thu Feb 09 10:43:01 EST 2017)

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