Answer: 56 inches
Explanation:
To find the length of each side, use Pythagorean's Theorem, a² + b² = c²
Note the bottom sides are the same length and the top two are the same length.
Bottom sides:
5² + 12² = c²
25 + 144 = c²
169 = c²
13 = c
Top sides:
9² + 12² = c²
81 + 144 = c²
225 = c²
15 = c
Add it all together
13 + 13 + 15 + 15 = 56
The perimeter is 56 inches.
Hope this helps!