Question

Which expression represents the perimeter, in units, of this trapezoid? (45 points)

Answer 1

A. 7x + 3

Explanation:

The perimeter of a 2D shape is the distance all the way around the outside.

⇒ perimeter = (2x + 1) + (x + 1) + (3x - 1) + (x + 2)

= 2x + 1 + x + 1 + 3x - 1 + x + 2

= 2x + x + 3x + x + 1 + 1 - 1 + 2

= 7x + 3