Lesson Plan


A math problem involving the area of an irregular quadrilateral and the Pythagorean Theorem


  • Mathematics > General
  • Mathematics > Geometry

Education Levels:

  • Grade 6
  • Grade 7
  • Grade 8
  • Grade 9
  • Grade 10
  • Grade 11
  • Grade 12


geometry measurement coordinate conjecture pythagorean theorum trapezoid triangle triangles



Access Privileges:

Public - Available to anyone

License Deed:

Creative Commons Attribution 3.0


Update Standards?

S2486744: Texas Essential Knowledge and Skills for Mathematics

represent and solve problems related to perimeter and/or area and related to volume.
Curriki Rating
On a scale of 0 to 3
On a scale of 0 to 3

This resource was reviewed using the Curriki Review rubric and received an overall Curriki Review System rating of 3, as of 2009-07-26.

Component Ratings:

Technical Completeness: 3
Content Accuracy: 3
Appropriate Pedagogy: 2

Reviewer Comments:

This lesson/exercise turns on a coincidence - one of the angles of the quadrilateral turns out to be a right angle because of the choice of lengths. Unfortunately, there’s no general lesson that can be drawn from a coincidence.

Not Rated Yet.

Non-profit Tax ID # 203478467