Area of Trapezoids

This worksheet provides a series of hints for the development of a formula for the area of trapezoids. You may want to [list] [*]Use the [color=#1551b5]blue slider[/color] and see what happens. [*]If you need additional hints move the [color=#1551b5]blue slider[/color] to the rightmost position and continue with the black slider that appears. [*]Drag the [color=#1551b5]blue points[/color] and the dashed line to create different trapezoids. [*]Click on the button in the upper right corner to reset the construction. [/list]

Develop a formula for the area of the trapezoid! Write down the displayed values for a, c, h and the trapezoid area and test your formula!