Let's break this down in simpler terms suitable for a 6th-grade level, with all the steps clearly explained.

Shape A (Trapezoid):

1. Perimeter means the total distance around the shape.
   • We add up all four sides of the trapezoid:
     • One side is 13 meters (height).
     • Another side is 11 meters (short base).
     • The slanted side is 9.55 meters.
     • The fourth side (top) is the same as the bottom: 11 meters.
   • Now, let's add them: $13 + 11 + 9.55 + 11 = 44.55 \, \text{meters}$
   • So, the perimeter of the trapezoid is 44.55 meters.

Shape B (Right Triangle):

1. Perimeter means the total distance around the triangle.
   • A right triangle has two legs (short sides) and one longer side (hypotenuse).
   • We are given two sides:
     • One side is 6.9 meters.
     • The other side is 5.8 meters.
   • To find the third side (the hypotenuse), we use the