Warm Up - PowerPoint PPT Presentation

1 / 8
About This Presentation
Title:

Warm Up

Description:

Classifying Polygons Objective: Students will identify and name polygons. Perimeter of polygons will also be found. – PowerPoint PPT presentation

Number of Views:77
Avg rating:3.0/5.0
Slides: 9
Provided by: Charlo140
Category:
Tags: polygons | warm

less

Transcript and Presenter's Notes

Title: Warm Up


1
Warm Up
  • A complement of an angle is five times as large
    as the angle. Find the angles.
  • The measure of one of two complementary angles is
    six less than twice the measure of the other.
    Find the angles.

2
Classifying Polygons
  • Objective
  • Students will identify and name polygons.
    Perimeter of polygons will also be found.

3
Polygons
  • A polygon is a closed figure formed by coplanar
    segments such that
  • The sides that have a common endpoint are NOT
    collinear
  • Each side intersects exactly 2 other sides, but
    ONLY at their endpoint
  • A polygon is named by the letters of its vertices
    written in CONSECUTIVE order.

4
Convex or Concave?
  • Convex polygons have no points of the lines in
    the interior of the figure.
  • Concave polygons have some of the lines passing
    through the interior of the figure.

5
Regular or Irregular?
  • A convex polygon in which all the sides are
    congruent and all the angles are congruent is a
    regular polygon.
  • Otherwise, the polygon is irregular.

6
Names of Polygons
Number of Sides Polygon Name
3 Triangle
4 Quadrilateral
5 Pentagon
6 Hexagon
7 Heptagon
8 Octagon
9 Nonagon
10 Decagon
12 Dodecagon
n N-gon
7
Perimeter
  • The perimeter of a polygon is the sum of the
    lengths of its sides.
  • Find the perimeter
  • Find x

8
Classify the polygon
  • Name the polygon by its number of sides. Then
    classify it as convex or concave and regular or
    irregular.
Write a Comment
User Comments (0)
About PowerShow.com