Respuesta :

Let's find the area of one face

[tex]A=\frac{bh}{2}[/tex]

Where h = b = 1.

[tex]A=\frac{1\cdot1}{2}=\frac{1}{2}[/tex]

Given that there are four faces, we have to multiply the area above by 4

[tex]S=4\cdot\frac{1}{2}=2[/tex]

Hence, the answer is 2 square units.