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

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.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.

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

virtualnerd.com/geometry/length-area/trapezoids-rhombuses-kites-area/trapezoid-area-formula

You could start by creating a parallelogram out of two **trapezoids**. Then, use the ...
half of a parallelogram; **trapezoid**; **area**; **formula**; base 1; base 2; 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: ,. where is the value of the top base, is
value of the bottom base, and is the value of the height. Plugging in our values, ...

illuminations.nctm.org/Lesson.aspx?id=1893

The main portion of this lesson involves the derivation of an **area formula** for
**trapezoids**. Prior to that, allow students some exploration time. Ask them to
suggest ...