Trapezoid transformation to rectangle

The area formula for a trapezoid can be written as ¹/₂(base₁+base₂)*h. The average of the bases, ¹/₂(base1+base2), is called the median of the trapezoid. So the area can be seen as the median*h, a much simpler rectangular formula. We will transform by rotation the trapezoid into a rectangle by using the rotation slider. Adjust the width of the trapezoid by dragging on the corners; this app works when the base2 angles are acute. Adjust the height of the trapezoid by using the slider.

 

Bill Lombard

 
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transformation 
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11 – 19+
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English (United States)
 
 
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4.4
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