Answer:
n=25
Step-by-step explanation:
Using the relation that describes the measure of the angle formed by two secants being equal to half of the difference of the 2 arcs (large arc-small arc) we can establish the relation;
[tex]10 = \frac{45 - n}{2} [/tex]
[tex]20 = 45 - n[/tex]
[tex] - 45 + 20 = - n[/tex]
[tex] - 25 = - n[/tex]
[tex]n = 25[/tex]
