trapezoid

 

 

 

 

 

 

 

In Euclidean geometry, a convex quadrilateral with at least one pair of parallel sides is referred as a trapezoid.
The parallel sides are called the bases of the trapezoid and the other two sides are called the legs.

  Area = 1/2(a + b) x h 

  Perimeter = a + b + c + d