Answer:
I guess this is the answer
Answer: 741
Step-by-step explanation:
As per given ,we have
The prior estimate of population proportion: 
Margin or error : 2.5%=0.025
Critical value for 95% confidence = 
Formula to find the sample size :-

i.e. 

Hence, the minimum sample size required to obtain this type of accuracy= 741
The answer is 45! A triangle measures 180 in total so add all those three angles to get 180.