Geometry 1.6 Classify Polygons by aku11392

VIEWS: 0 PAGES: 17

									Geometry 1.6 Classify
     Polygons
 Notetaking Guide pages 21 – 23
12 8
           Definition of Polygon
   A polygon is a closed figure formed by a finite
    number of coplanar segments such that:
   1. the sides that have a common endpoint are
    non-collinear, and
   2. each side intersects exactly two other sides,
    but only at their endpoints
    Definition of a Regular Polygon
   A regular polygon is a convex polygon with all
    sides congruent and all angles congruent.
   Only convex polygons can be regular.
Polygons are classified by number of
               sides.
   3 sides    triangle
   4 sides    quadrilateral
   5 sides    pentagon
   6 sides    hexagon
   7 sides    heptagon
   8 sides    octagon
   9 sides    nonagon
   10 sides   decagon
   12 sides   dodecdagon
   n sides    n-gon
             Other Vocabulary
   Convex – no line that contains a side of the
    polygon contains a point in the interior of the
    polygon
   Concave – a polygon that is not convex
   n-gon – a polygon with n sides
   Equilateral – all sides are congruent
   Equiangular – all angles in the interior of the
    polygon are congruent
                  polygon
   Notetaking Guide pages 22-23

          sides
                               two
                  collinear
                              vertex
    not a polygon
            a convex polygon
            a concave polygon




convex polygon           not a polygon
8
    regular octagon
  congruent
4x + 3 5x – 1
   4    x

      4              4   19
                19
quadrilateral




60°
Summary
            TAKS REVIEW
   A function f(x) = -2x2 – 5 has
    {-37, -7, -13, -23} as the replacement set for
    the dependent variable. Which of the
    following contained in the corresponding set
    for the independent variable?
a. -343      b. -103        c. -6      d. 1
        TAKS REVIEW
REMEMBER
UNITS OF AREA ARE SQUARED
UNITS OF VOLUME ARE CUBED

								
To top