Final answer:
MN is equal to half the sum of the lengths of segments AB and CD, which can be represented as MN = (AB + CD) / 2.
Step-by-step explanation:
An equation is a mathematical statement that asserts the equality of two expressions. Equations are commonly written with an equal sign (=) and consist of two sides, the left-hand side (LHS) and the right-hand side (RHS). The values on both sides are equivalent.
Considering the given information, MN is equal to half the sum of the lengths of segments AB and CD. To represent this mathematically, we can write MN = (AB + CD) / 2 as the correct statement.