SQR(998)+6/4=33.091^2=1095------对照下SQUARE OF NINE是否对应998 45度角. 8 Q" p& P R4 j f, d8 m z- p
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improved Daniel formula:
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/ J; E% t) o8 J. H3 }ring#=round((sqrt(998)-0.22/2),2)/2+0.5=16 l7 l3 K3 [1 _! Y- ]- {
" l0 p" |1 s/ ]8 E, {7 ~ F7 P315_degree=(16*2+1)^2)=1089
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In sq9 998 at 56 degree 7 e# S1 r) J4 N" G( n! N
: v% \. ~' `* h( E; ?1089-360*3-56=47 degree |