9. Find the length of the left out portion

Sheela prepares a triangle filled up with natural food products. She is left up with one strip of small length left for the nuts to complete the triangle. First, she needs to figure out the length of left out portion based on the lengths of the other sides where \(BD = 3\) inches, \(DC = 6\) inches, \(CE = 6\) inches, \(EA = 11\) inches and \(FB = 18\) inches as shown in the figure.

 

 

Answer:

 

The length of left out portion is  inches