Trapezoids: Area and Perimeter
The parallel sides are called the bases and the non-parallel sides are the legs of the trapezoid.
An isosceles trapezoid is a trapezoid in which the two non-parallel sides are congruent .
The area of a trapezoid is given by
where and are the lengths of the two parallel sides, and is the height, as shown in the figure below.
Find the area and perimeter of the trapezoid shown.
To find the area, apply the formula.
To find the perimeter, add the lengths of all four sides.