Answer: 
Step-by-step explanation:
Given
Radius of circle 
Length of chord is 
Suppose the distance between the chord and center is x
From figure, we can write

You must distribute each value like this:

Hope that helps!
Answer:
I'm not sure about the factors, but it's reflected over the x axis if they helps narrow it down
Answer:
3,4,5
Step-by-step explanation:
appear mutiple times
Answer: 7 times 4
Step-by-step explanation: