Education Technology

Algebra 2: Areas of Polygons
by Texas Instruments

Published on August 25, 2011

Objectives

  • Discover the determinant method for finding the areas of triangles and quadrilaterals

Vocabulary

  • determinant
  • scalar multiple
  • convex/concave polygons

About the Lesson

This lesson involves using determinants of matrices as a tool to find the areas of triangles and quadrilaterals. As a result, students will:

  • Identify the correct scalar multiple for the determinant expression to find the area of a triangle.
  • Identify the determinate expression to find the area of a quadrilateral.