Question

statement reason 1 ce = fg given 2 cd = dg given 3 de = fd reason? validate please select a rule.

Explanation:

Step1: Analyze given equal - lengths

We have $CE = FG$ and $CD=DG$.

Step2: Use segment - subtraction property

If we consider the segments on the lines, since $CE - CD=DE$ and $FG - DG = FD$, and $CE = FG$, $CD = DG$, by the subtraction property of equality, we can get $DE = FD$.

Answer:

Subtraction property of equality