To use this calculator you need to know the 4 sides of the trapezoid

Lines BC and AD are parallel and are called Bottom

Lines AB and DC are called trapezoids. waist

Lines AC and DB are called diagonal

The line perpendicular to AD & BC is called a trapezoid. high。

The line parallel to AD & BC and located between AB and DC is called the trapezoid.Median

Median = ( AD + BC) ÷ 2