Find radius if a circle is inscribed in quadrilateral

[amitdixit]

 

[chiro]

Hey amitdixit and welcome to the forums.

What have you tried? What have you already thought about?

 

[jedishrfu]

you need to show some work before we can help.

To give you a hint the answer it isnt a) since the diameter would be 22cm but DC is 25cm do you see why?

Next hint is that br=bq and lines that are tangent to the circle are perpendicular to the radius drawn there so you can construct some intermediate triangles and test the other possible answers.