www.khanacademy.org/math/basic-geo/basic-geo-area-and-perimeter/area-trap-composite/v/area-of-a-trapezoid-1

Area of a trapezoid is found with the formula, A=(a+b)/2 x h. Learn how to use the formula to find area of trapezoids.

www.mathgoodies.com/lessons/vol1/area_trapezoid.html

To find the area of a trapezoid, take the sum of its bases, multiply the sum by the height of the trapezoid, and then divide the result by 2, The formula for the area ...

www.virtualnerd.com/tutorials/?id=PreAlg_11_03_0004

www.mathopenref.com/trapezoidarea.html

Area of a trapezoid ("trapezium" in British usage). The number of square units it takes to completely fill a trapezoid. Formula: Average width × Altitude.

keisan.casio.com/exec/system/1223273662

Calculates the area of a trapezoid given two parallel sides and the height.

www.wikihow.com/Calculate-the-Area-of-a-Trapezoid

How to Calculate the Area of a Trapezoid. A trapezoid (also known as a trapezium in British English) is a quadrilateral with two parallel sides of different lengths.

www.varsitytutors.com/advanced_geometry-help/how-to-find-the-area-of-a-trapezoid

The formula for the area of a trapezoid is the average of the bases times the height,. \displaystyle A=\frac{b_{1}+b_{2}}{2}h. Looking at this problem and when the ...

www.mathplayground.com/howto_area_trapezoid.html

Math video teaches students how to find the area of a trapezoid.