Answer:
27 IN
Step-by-step explanation:
If you want to calculate the perimeter of an irregular trapezoid, there's no special formula - just add all four sides:
Trapezoid perimeter = a + b + c + d
Maybe you've noticed, but it's the formula for any quadrilateral perimeter.
There's also an option that that presents itself with certain special trapezoids - like an isosceles trapezoid, where you need a, b, and c sides. Another example is a right trapezoid, where the length of the bases and one leg are enough to find the shape's perimeter (the last leg is calculated using Pythagoras' Theorem).
