①abc→abd, ab=ad, 45/2=22.5
ab√2-ac1=tanA/2→tan22.5=√2-1
ad=ac1+cd(tan22.5)=√2
bc=bc1²+cd(tan22.5)²=1/cos22.5
67.5/2=33.75
tan33.75=bc(1/cos22.5)-cd(tan22.5)
ab√2+ac1=tan67.5(2.4142135623730950488016887242097)
②bcd→bde, de=bd, 67.5/2=33.75
bd(1/cos22.5)-cd(tan22.5)=ec(tan33.75(0.66817863791929891999775768652308))
de=tan22.5+an33.75=1/cos22.5
be=√(bc1+ec(tan33.75²))=1/cos33.75(1.20268
97738700905610874436478184)
(90-33.75)×½=28.125
tan28.125=be(1/cos33.75)-tan33.75
bd(1/cos22.5)+cd(tan22.5)=ec(tan56.25(90-33.75(1.4966057626654890176011351349425)
*22.5/2=11.25→90-11.25=78.75
bd(1/cos22.5)-cd(tan45)=0.19891236737965800691159762264468
0.19891236737965800691159762264468
5.0273394921258481045149750710641
③bce→bef, be=ef, 56.25/2=28.125
be(1/cos33.75)-tan33.75=cf(tan28.125)
ef=ec(tan33.75)+cf(tan28.125)=1/cos33.75
bf=√(bc1+cf(tan28.125²)=1/cos28.125(1.133888
06963271540736107583030)98
(90-28.125)×½=30.9375
tan30.9375=be(1/cos28.125)-tan28.125
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