Concept:The perimeter of a quadrilateral is the sum of its four side lengths.Explanation:From the given figure, the side lengths of quadrilateral EFGH add up to 20Â m.So, Perimeter of EFGH=20Â m.Column A is 20Â m and Column B is 20Â m.Since both quantities are equal, the correct choice is C.Answer:The two quantities are equal.