Education Technology

Middle Grades Math: We've Got You Covered: 2D Area
by Texas Instruments

Published on November 26, 2011


  • Students will solve real-world and mathematical problems involving area of two-dimensional objects composed of triangles, quadrilaterals, and polygons.


  • area
  • scale
  • base and height
  • triangle
  • quadrilaterals
  • polygons

About the Lesson

This lesson involves using the geometry tools to measure the area of two-dimensional shapes from the faces of three-dimensional objects they see in pictures taken outside of the classroom.
As a result, students will:

  • Further develop visualization skills as they search for 2D faces in the 3D shapes in the pictures.
  • Further develop approximation skills as they adjust the size of the default scale provided so that the measures they find from the 2D faces will be appropriate.
  • Solve real-world and mathematical problems involving the area of 2D shapes, possibly of their own creation if time permits students to take their own pictures.