Angle CED = X = 75°

수식 17: "B" Subscript, 2 , Baseline equals "O" Subscript, 2 , Baseline

수식 18: "C" Subscript, 1 , Baseline equals "R" cosine "B" Subscript, "O" "C" , Baseline

수식 19: "C" Subscript, 2 , Baseline equals "R" sine "B" Subscript, "O" "C" , Baseline

수식 20: "m" Subscript, 1 , Baseline equals tangent "B" Subscript, "A" "C" , Baseline

수식 21: "m" Subscript, 2 , Baseline equals tangent left parenthesis, 180 minus "A" Subscript, "B" "D" , Baseline , right parenthesis

수식 22: "y" equals "m" Subscript, 1 , Baseline left parenthesis, "x" minus "A" Subscript, 1 , Baseline , right parenthesis

수식 23: "y" equals "m" Subscript, 2 , Baseline left parenthesis, "x" minus "B" Subscript, 1 , Baseline , right parenthesis

수식 24: "m" Subscript, 1 , Baseline left parenthesis, "x" minus "A" Subscript, 1 , Baseline , right parenthesis equals "m" Subscript, 2 , Baseline left parenthesis, "x" minus "B" Subscript, 1 , Baseline , right parenthesis

수식 25: "D" Subscript, 1 , Baseline equals StartFraction, "m" Subscript, 1 , Baseline "A" Subscript, 1 , Baseline minus "m" Subscript, 2 , Baseline "B" Subscript, 1 , Baseline Over "m" Subscript, 1 , Baseline minus "m" Subscript, 2 , Baseline , EndFraction

수식 26: "D" Subscript, 2 , Baseline equals "m" Subscript, 1 , Baseline left parenthesis, "D" Subscript, 1 , Baseline minus "A" Subscript, 1 , Baseline , right parenthesis

수식 27: "E" Subscript, 1 , Baseline equals "B" Subscript, 1 , Baseline plus StartFraction, "A" Subscript, "D" , Baseline Over "B" Subscript, "C" , Baseline , EndFraction left parenthesis, "C" Subscript, 1 , Baseline minus "B" Subscript, 1 , Baseline , right parenthesis

수식 28: "E" Subscript, 2 , Baseline equals "B" Subscript, 2 , Baseline plus StartFraction, "A" Subscript, "D" , Baseline Over "B" Subscript, "C" , Baseline , EndFraction left parenthesis, "C" Subscript, 2 , Baseline minus "B" Subscript, 2 , Baseline , right parenthesis

Graphs

수식 30: polygon left parenthesis, "B" , "D" , right parenthesis

수식 31: polygon left parenthesis, "D" , "E" , right parenthesis

수식 32: left parenthesis, "R" cos "t" , "R" sin "t" , right parenthesis

수식 33: polygon left parenthesis, "A" , "B" , "C" , right parenthesis

Points