C = 2 * a + 2 * b

S = a * v

C = circumference

S = surface area

a = side "a"

b = side "b"

h = height

WHAT IS IT ?

A 4-sided flat shape with straight sides where opposite sides are parallel.And

• opposite sides are equal in length, and

• opposite angles are equal

• opposite sides are equal in length, and

• opposite angles are equal