Answer:
1.5 units
Step-by-step explanation:
It was given that two of the vertices of square QRST are
Q(3.6.2.1) and R 5.1.2.1).
These are two consecutive vertices of one horizontal side of the square.
Using the absolute value method;
[tex]|QR|=|5.1-3.6|=1.5[/tex]
A square has all sides equal.
Therefore each sides of the square is 1.5 units.
