# Area of a trapezoid calculator

This trapezoid calculator will compute the area of a trapezoid for you. Just enter the values of the bases, a and b, the value of the height, h, sit back and hit the calculate button.
Enter the value of base b1:

Enter the value of base b2

Enter the height h :

The area of the trapezoid is :

Remember that the formula to get the area of a trapezoid is:

So, if b1 = 2 cm, b2 = 4 cm, and h = 6 cm

(b1 + b2)/2 = (2 + 4)/2 = 6/2 = 3

A= 3 × 6 = 18 cm2

## Guidelines to follow when using the trapezoid calculator

Convert fractions into decimals before entering them, so do not enter any number with a slash "/ "

Do not enter negative number since a distance cannot be negative.

Do not enter the unit. For example, for 15 cm, just enter 15.

## Examples showing how to use the calculator in order to find the area of a trapezoid.

Example #1

Use the trapezoid calculator to find the area of a trapezoid with bases 6 cm and 9 cm and height 5 cm.

Enter 6 in the box that is labeled 'Enter the value of base b1'

Enter 9 in the box that is labeled 'Enter the value of base b2'

Enter 5 in the box that is labeled 'Enter the height h'

Hit the button labeled 'Calculate'

The calculator will display 37.5 in the box labeled ' The area of the trapezoid is'

The area of the trapezoid is 37.5 cm2

Example #2

The end of a gold bar usually has the shape of a trapezoid. Use the trapezoid calculator to find the area of the end of the gold bar with bases 4 cm and 2 cm and height 3 cm.

Enter 4 in the box that is labeled 'Enter the value of base b1'

Enter 2 in the box that is labeled 'Enter the value of base b2'

Enter 3 in the box that is labeled 'Enter the height h'

Hit the button labeled 'Calculate'

The calculator will display 9 in the box labeled ' The area of the trapezoid is'

The area of the end of the gold bar is 9 cm2

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