As shown in the figure below, point E lies on the opposite half-plane determined by line CD from point A so that ∠CDE=110∘. Point F lies on AD so that DE=DF, and ABCD is a square. What is the degree measure of ∠AFE?
[asy]
size(6cm);
pair A = (0,10);
label("A", A, N);
pair B = (0,0);
label("B", B, S);
pair C = (10,0);
label("C", C, S);
pair D = (10,10);
label("D", D, SW);
pair EE = (15,11.8);
label("E", EE, N);
pair F = (3,10);
label("F", F, N);
filldraw(D--arc(D,2.5,270,380)--cycle,lightgray);
dot(A^^B^^C^^D^^EE^^F);
draw(A--B--C--D--cycle);
draw(D--EE--F--cycle);
label("110∘", (15,9), SW);
[/asy]
<spanclass=′latex−bold′>(A)</span>160<spanclass=′latex−bold′>(B)</span>164<spanclass=′latex−bold′>(C)</span>166<spanclass=′latex−bold′>(D)</span>170<spanclass=′latex−bold′>(E)</span>174