Section 6
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Section 6 Presentation Transcript

  • 1. 1.6 Two-Dimensional Figures
  • 2. Polygon
    • A polygon is a closed figure formed by a finite number of coplanar sugments such that
      • The sides that have a common endpoint are noncollinear, and
      • Each side intersects exactly two other sides, but only at their endpoints.
  • 3. Polygon
    • A polygon is name by the letters of its vertices, written in order of consecutive vertices.
  • 4. Polygon
    • Polygons can be concave or convex.
    • Suppose the line containing each side is drawn. If any of the lines contain any point in the interior of the polygon then it is concave. Otherwise it is convex.
  • 5. Types of Polygons
    • A polygon with n sides is an n-gon.
    • A convex polygon in which all sides are congruent and all the angles are congruent is called a regular polygon.
  • 6. Perimeter, Circumference, and Area
    • The perimeter P of a polygon is the sum of the length of the sides of the polygon.
    • The circumference C of a circle is the distance around the circle.
    • The area A is the number of square unites needed to cover a surface.
  • 7. Triangle
  • 8. Square
  • 9. Rectangle
  • 10. Circle