The perimeter is equal to the sum of the four side lengths of the trapezium. Find the length of the missing side of the trapezium shown.
Please directly answer the question and provide the final value, e.g., 1, 2.5, 300.
Question: The perimeter is equal to the sum of the four side lengths of the trapezium. Find the length of the missing side of the trapezium shown.
Please first conduct reasoning, and then answer the question and provide the final value, e.g., 1, 2.5, 300, at the end.
Question: The perimeter is equal to the sum of the four side lengths of the trapezium. Find the length of the missing side of the trapezium shown.