Answer:
[tex] \frac{1}{2} (2)(3) = 3 \: umit \: sq \\ \frac{1}{2} (1)(1) = \frac{1}{2} \: umit \: sq \\ 3 - \frac{1}{2} = \frac{6 - 1}{2} \\ = \frac{5}{2} \: umit \: sq[/tex]
