Lines BC and AD are parallel and are called bases.
Lines AB and DC are the non-parallel sides and are called legs.
Lines AC and DB are called diagonals.
The line perpindicular to lines AD & BC is called the height or altitude.
height2= [(a+b-c+d)(-a+b+c+d)(a-b-c+d)(a+b-c-d)] ÷ (4(a-c))2
The line parallel to lines AD & BC, is at the midpoints of lines AB and DC and is called the median.
The length of the median = (Line AD + Line BC) / 2
Trapezoid Area = height × median
ALL TRAPEZOIDS have the
The isosceles trapezoid has both legs of equal length, each pair of angles along each base are equal AND both diagonals are equal.
The right trapezoid has two right angles.
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