MTH213
Foundations of Elementary Math 3

Fun with Geometry. pattern blocks

MTH213
Notes on Geometry
Spring 2020

Chapter 10 Geometric Figures

§ 10.2 Polygons and Tessellations
  • Angles in Polygons
    • Interior angles, aka vertex angle
    • Notation
    • Sum of Interior angles
    • The sum of the interior angles of any triangle is 180 degrees

    • Activity: Find a formula for the sum of the interior angles of an n-gon.
  • Congruence
    • Congruent line segments
    • Congruent angles
    • Congruent plane figures
  • Regular Polygons
    • Equilteral Triangle
    • Square
    • Others
  • Polygon Angles
    • Internal, aka vertex
    • External
    • Central
  • Drawing Regular Polygons
  • Tesselations