How to find Radius R

Expression 20: "y" equals StartFraction, negative 1 Over "m" Subscript, 1 , Baseline , EndFraction left parenthesis, "x" minus "K" Subscript, 1 , Baseline , right parenthesis plus "K" Subscript, 2 , Baseline

Expression 21: StartFraction, negative 1 Over "m" Subscript, 1 , Baseline , EndFraction left parenthesis, "x" minus "K" Subscript, 1 , Baseline , right parenthesis plus "K" Subscript, 2 , Baseline equals "O" Subscript, 2 , Baseline

Expression 22: "J" Subscript, 1 , Baseline equals StartFraction, StartNestedFraction, 1 NestedOver "m" Subscript, 1 , Baseline , EndNestedFraction "K" Subscript, 1 , Baseline plus "K" Subscript, 2 , Baseline Over StartNestedFraction, 1 NestedOver "m" Subscript, 1 , Baseline , EndNestedFraction , EndFraction

Expression 23: "J" Subscript, 2 , Baseline equals "O" Subscript, 2 , Baseline

Expression 24: left parenthesis, "R" Subscript, 2 , Baseline plus "R" Subscript, 4 , Baseline , right parenthesis squared equals left parenthesis, "M" Subscript, 1 , Baseline minus "L" Subscript, 1 , Baseline , right parenthesis squared plus left parenthesis, "M" Subscript, 2 , Baseline minus "L" Subscript, 2 , Baseline , right parenthesis squared

Expression 25: StartFraction, left parenthesis, "R" Subscript, 2 , Baseline plus "R" Subscript, 4 , Baseline , right parenthesis squared minus left parenthesis, "M" Subscript, 2 , Baseline minus "L" Subscript, 2 , Baseline , right parenthesis squared minus "M" squared Over "L" squared minus 2 "M" Subscript, 1 , Baseline "L" Subscript, 1 , Baseline , EndFraction equals 1

Expression 26: "L" squared plus "a" "L" Subscript, 1 , Baseline plus "b" equals 0

Expression 27: "a" equals negative 2 "M" Subscript, 1 , Baseline

Expression 28: "b" equals "M" squared minus left parenthesis, "R" Subscript, 2 , Baseline plus "R" Subscript, 4 , Baseline , right parenthesis squared plus left parenthesis, "M" Subscript, 2 , Baseline minus "L" Subscript, 2 , Baseline , right parenthesis squared

Expression 29: "L" Subscript, 1 , Baseline equals StartFraction, negative "a" Over 2 , EndFraction minus StartRoot, left parenthesis, StartFraction, negative "a" Over 2 , EndFraction , right parenthesis squared minus "b" , EndRoot

Expression 30: "L" Subscript, 2 , Baseline equals "R" Subscript, 2 , Baseline

Expression 31: "M" Subscript, 1 , Baseline equals StartAbsoluteValue, 12 , EndAbsoluteValue

Expression 32: "M" Subscript, 2 , Baseline equals "R" Subscript, 4 , Baseline

Graphs

Expression 34: "y" less than 30

Expression 35: left parenthesis, "H" Subscript, 1 , Baseline , "H" Subscript, 2 , Baseline minus "t" "R" , right parenthesis

Expression 36: left parenthesis, "H" Subscript, 1 , Baseline plus "R" cos "t" , "H" Subscript, 2 , Baseline plus "R" sin "t" , right parenthesis

Expression 37: left parenthesis, "L" Subscript, 1 , Baseline plus "R" Subscript, 2 , Baseline cos "t" , "L" Subscript, 2 , Baseline plus "R" Subscript, 2 , Baseline sin "t" , right parenthesis

Expression 38: left parenthesis, "M" Subscript, 1 , Baseline plus "R" Subscript, 4 , Baseline cos "t" , "M" Subscript, 2 , Baseline plus "R" Subscript, 4 , Baseline sin "t" , right parenthesis

Points

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