What is the method ( if there is one) for figuring the radius of the circle below when all I have is the chord length (red line # 2 = 177inches) and the radius segment ( blue line #1 = 12 inches).

(The blue line segment is on the radius even if my image shows it a little off.)

My guess annd check method using some graph paper gets me 336 inches, but I'd like to be a little more confident.

thanks

Mark

(The blue line segment is on the radius even if my image shows it a little off.)

My guess annd check method using some graph paper gets me 336 inches, but I'd like to be a little more confident.

thanks

Mark

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