Answer:

Step-by-step explanation:

C because it makes complete common sense but idk though just in case I'm wrong and u can't blame me lol
Answer:
Perimeter = 78.7 inches
Step-by-step explanation:
From the given question, applying the Pythagoras theorem to one of the congruent triangles formed, we have;
=
+ 
=
+ 
=841 + 81
= 922
hyp = 
= 30.3645
The perimeter of the triangle can be determined as;
perimeter =
+
+ 
= 30.3645 + 18 + 30.3645
= 78.729
The perimeter of the triangle = 78.7 inches
I think it is 1/9 but I am not sure