**Formula For Area Of Isosceles Trapezoid**. Find the height of an isosceles trapezoid if given 1. It is the space of the internal surface in a figure, it is limited for the.

The formula for an isosceles trapezoid is a= 1/2 * h (b_1 + b_2) where h is the height, and b_1 and b_2 are the bases. Find the length of each base ( a and b ). Substituting the value for m into the original trapezoid area formula: