Answer:
Step-by-step explanation:
Given
7.2, a, b, 3 are in A.P


as
a, b, 3 are also in A.P

Putting 










Now, plugging
in 




Therefore,
The answer to ur question is option(B.) a circle inscribed inside the triangle....
Hope this helps u....!!
Answer:
Following are the solution to the question:
Step-by-step explanation:

Step-by-step explanation:
the answer is in the above image