The second term in a geometric sequence is 20. the fourth term in the same sequence is 45/4 or 11.25. what is the common ratio in this sequence?

 

In the first triangle 80+20+p=180 (since sum of all angles of a triangle is 180)so p= 80also in second triangle 55+45+q=180 (since sum of all angles of a triangle is 180)so q=80so we can conclude that p=80 degrees q=80 degrees so p=q=80 degreeshence option b is correct