Use the Given Triangles to Evaluate the Expression $\tan \frac { \pi } { 4 }$

Multiple Choice

Use the given triangles to evaluate the expression. Rationalize all denominators.
- $\tan \frac { \pi } { 4 }$

A) 1
B) $\frac { \sqrt { 3 } } { 2 }$
C) $\frac { \sqrt { 2 } } { 2 }$
D) $\sqrt { 2 }$