SQR(998)+6/4=33.091^2=1095------对照下SQUARE OF NINE是否对应998 45度角.
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improved Daniel formula:% x- u2 V. I! W# K; q
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( C) x% j% _+ i% m$ |" B4 pring#=round((sqrt(998)-0.22/2),2)/2+0.5=16
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8 i+ O5 k+ d) M# p0 U# s315_degree=(16*2+1)^2)=1089; r9 u6 P9 \; f1 m, ~( i
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; _2 f. p& F. _" ]' O5 ]0 D. @In sq9 998 at 56 degree
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1089-360*3-56=47 degree |