Calculating the area of a trapeze
In this videotutorial we wanne show you how easy it is to calculate the area and of a trapeze. You will see, that a trapeze can easily be “changed” into a virtual rectangle.
Be sure, it is far easier than you might think!
This is one of our fist videotutorials in english, so bear with us

Thx for the hint
Yes ment that. Never did english videos like this before
@ 2:00 i think you mean virtual square. but otherwise, great vid!