What is the value of y ?

Answer:
6
Step-by-step explanation:
Chords within a circle are proportional. Proportional means that they form equal ratios. To solve for y, set up a proportion.
The ratios we will create will be [tex]\frac{long}{short} =\frac{long}{short}[/tex] where each long and short form an angle.
So write:
[tex]\frac{12}{8} =\frac{y}{4}[/tex]
To solve, cross multiply numerator with denominator.
12(4) = 8(y)
48=8y
6=y