Step 1: Find the side from the perimeter.<br>
Perimeter = 4 × side &rArr; 48 = 4 × side<br>
&bull; Side = 48 ÷ 4 = 12 cm<br><br>
Step 2: Find the area.<br>
Area = side × side<br>
&bull; = 12 × 12 = 144<br>
<br>
Final Answer: 144 cm&sup2;