Find the perimeter of the figure below. Notice that one side length is not given. Assume that all intersecting sides meet at right angles.
Be sure to include the correct unit in your answer.

Perimeter of the given polygon = 48 ft

Step-by-step explanation:

Perimeter of the given polygon = Sum of measures of all sides of the polygon

                                                    = AB + BC + CD + DE + EF + FA

                                                    = 9 + 7 + CD + 8 + 4 + 15

                                                    = 43 + CD

Since, CD = AB - EF

                 = 9 - 4

                 = 5 ft

Therefore, perimeter of the given polygon = 43 + 5

                                                                       = 48 ft        

not only in mathematics, scientific proof also are required in the other field of science. also maths proofs are of particular structure, containing steps and logics. so proving is like doing science, it is science. that's why it is important to prove. 

an inaccurate proof leads to errors, or stating results that are not accurate.  which wil mess the probelm up you dont want this