The opposite angle is also 80°. since consecutive angles must total 180, the other 2 angles are 100 each. 100+100+80+80=360, as needed for a parallelogram
Answer: 3
Step-by-step explanation: Hope I helped
Answer:

Step-by-step explanation:
From the question we are told that:
Percentage of audience in first concert 
Percentage of audience in second concert 
Percentage of audience in third concert 
Audience Percentage at at-least one concert 
Percentage of audience at first & second concert 
Percentage of audience in first & third concert 
Percentage of audience in second & third concert 
Generally the equation for probability of attending all concerts
is mathematically given by




Therefore the probability that a randomly selected audient attended all the concerts

<span>First, subtract 132 from 145, then divide 145 by that answer (13) and you will get : 11.1538461538</span>
So this is a BIDMAS question so first you do the division and multiplication so you do (15 x 18) + (12/3) + 9 and get 270 + 4 + 9 which you just add to get 283. Hope this helps :)