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Geometry
polygons, vidoetext, unit one, part B, lesson 3
27
Mathematics
10th Grade
09/29/2010

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Term
polygon
Definition
a general classification for all simple closed plane curves made up of straight line segments. THE word comes from teh Greek meaning "many angles" and typifies the gerneal nature of these geometric figures.
Term
triangle
Definition
a polygon with three line segments. least number of lines to work for a polygon
Term
equilateral triangle
Definition
a triangle in which all three sides are of equal measure draw lines through equal lines
Term
equiangular triangle
Definition
a triangle in which all three angles are of equal measure
Term
isoceles triangle
Definition
a triangle in which at least two of the three sides are of equal measure
Term
scalene triangle
Definition
a triangle in which no sides are of equal measure
Term
right triangle
Definition
a triangle in which one of the angles is a right angle
Term
acute triangle
Definition
a triangle in which all three angles meausre less that 90 degrees
Term
obtuse angle
Definition
a triangle in which one fo the three angles meausres greater than 90 degrees
Term
Quadrilateral
Definition
a polygon made with four line segments
Term
kite
Definition
a quadrilateral in which there are two distinct pairs fo conseutive sides which are on equal measure
Term
rhombus
Definition
a quadrilateral in which all four sides are of equal measure
Term
trapezoid
Definition
a quadrilateral in which only one pair of opposite sides ared paralell
Term
isoceles trapezoid
Definition
a trapezoid in which the two non parallel sides are of equal measure
Term
parrallelogram
Definition
a quadrilateral in whcih tehre are two pairs fo parallel sides
Term
rectangle
Definition
a parallelogram in which there are four right angles
Term
square
Definition
a rectangle in whcih all four sides are of equal measure
Term
pentagon
Definition
a polygon amde with five line segments
Term
hexagon
Definition
a polygon made with six line segments
Term
heptagon
Definition
a polygon made with seven line segments
Term
octagon
Definition
a polygon made with eight line segments
Term
nonagon
Definition
a polygon with nine line segments
Term
decagon
Definition
a polygon with tem line segments
Term
undecagon
Definition
a polygon with 11 line segments
Term
dodecagon
Definition
a polygon made with 12 line segments
Term
n-gon
Definition
a general polygon made with n sides
Term
circle
Definition
a special polygon. Simple closed plane curve made up of straight line segments with are so short that they approach a pote (intuitive concept not formal definintion)
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