



 
Christianah, I can help get you started. First I sketched a graph of the two given lines. Let P be the point where the line y = x + 4 intersects the Yaxis.
Draw the line through P that is perpendicular to y = x + 4. This is going to form the third side of the square. It intersects y = x  2 at Q. The line y = x + 4 has slope 1.
The side length of the square is the distance from P to Q. You can find this using the distance formula or by using Pythagoras theorem directly. I hope this helps. Write back if you need more assistance. Penny  


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