Below Orion's belt is a fuzzy area known as the Great Nebula of Orion. In this nebula is a bright star cluster known as the Trapezium, marked by four bright stars near the image center. The newly born stars in the Trapezium and surrounding regions show the Orion Nebula to be one of the most active areas of star formation to be found in our area of the Galaxy.
Colorful visual representation of area formulas for rectangles, triangles, parallelogram, triangles, trapezoids, and circles. Great addition to the classroom for elementary education and extremely helpful for remembering area!
The Geometry Tutor: Area of Trapezoids [DVD] 
Math Worksheets For Kids - LOTS of free, awesome, worksheets for math class!
6th Grade Unit 1: Area & Decimal Operations
How to prove the formula for the area of a trapezium
BBC Bitesize - How to prove the formula for the area of a trapezium
House 2 Rishon LeZion Features Two Boxes That Sits on a Trapezoidal Lot A modern home sits on a uniquely shaped lot but turned out really stunning. Not all lot areas are rectangular or square in shape. Some have irregular shapes while others are trapezoids and other...