# Calculate area of trapezoid

## ( Equivalent to: surface area of trapezoid )

In next fields, kindly type the dimensions of your shape in the text box under title [ Unknowns: ]. After you type your value, click "CALCULATE" button; the answer will be automatically calculated and displayed in the text box under title [ Answer: ]. Also, you will be able to animate your shape through buttons under the below figure.

## How to Calculate Area Of Trapezoid

*Example: What is the area of trapezoid with upper base = 9 units, lower base = 35 units and height = 20 units?*

As;

area of trapezoid = (upper base+lower base)/2*height

By substituting the above given data in the previous function;

(i.e.) = (9+35)/2*20

Answer is: units^{2}.

*Practice Question: Calculate area of trapezoid for the following problems:*

N.B.: After working out the answer of each of the next questions, click adjacent button of see the correct answer.

( i ) upper base = 14 units, lower base = 27 units and height = 13 units

( ii ) upper base = 25 units, lower base = 35 units and height = 19 units

( iii ) upper base = 9 units, lower base = 29 units and height = 13 units