The Length L of the Hypotenuse of a Right Triangle $L = \sqrt { x ^ { 2 } + y ^ { 2 } }$

Multiple Choice

The length L of the hypotenuse of a right triangle is $L = \sqrt { x ^ { 2 } + y ^ { 2 } }$ where x and y are the lengths of the other two sides. Find the length of the hypotenuse when the other sides measure 1 unit and $\frac { 4 } { 3 }$ units.

A) 1 unit
B) $\frac { \sqrt { 7 } } { 2 }$ units
C) $\frac { 25 } { 9 }$ units
D) $\frac { \sqrt { 7 } } { 3 }$ units
E) $\frac { 5 } { 3 }$ units