Answer:
It is given that ,M is mid point of ST.
So,SM=MT------(1)
Also, it is given that
SP=PT -------(2)
From (1) and (2)
Point M =Point T
And, T is mid point of PQ.
→ PT=QT-----(3)
From 2 and 3, we get
SP=PT=QT
Second Way
There is another geometrical shape possible .
The Image is attached below.