19/12/02 21:52:04.94 a5zqFxLP.net
>>111
S(A,P) = {y(P) -p}/2,
S(P,Q) = {x(P)y(Q) -x(Q)y(P) -q +p}/2,
S(Q,B) = {x(Q)(4/3) -(5/3)y(Q) -b +q}/2,
・y座標で3等分した場合
A (1, 0)
P ((√97)/9, 4/9)
Q ((√145)/9, 8/9)
B (5/3, 4/3)
S(A,P) = (4/9 - p)/2 = 0.006733131
S(P,Q) = {4(2√97 -√145)/81 +p -q}/2 = 0.004236483
S(Q,B) = {4(√145 -10)/27 +q -b}/2 = 0.002215716
S = {4(2√97 +2√145 -21)/81 - log(3)}/2
= 0.01318533 > 0.012360077