Geometry

Question Analysis:
This question involves properties of diagonals in parallelograms, specifically how diagonals behave when they intersect.
The main focus is on recognizing that diagonals of a parallelogram bisect each other.

Key Concept Explanation:
In a parallelogram, the diagonals bisect each other.
This means that the point where they intersect divides each diagonal into two equal parts.
So, if diagonal QS = 16 cm, and it is bisected at T, then QT = ½ × QS = 8 cm.

Step-by-Step Solution:
Identify what the question is asking: the length of QT.
Recognize the figure as a parallelogram, where diagonals PR and QS intersect at T.
Use the property of diagonal bisection:
Since QS = 16 cm and it is bisected,
QT = ½ × 16 = 8 cm.
Final Answer: 8 cm

Common Mistakes:
Assuming only one diagonal...