a^2+b^2=1,(1)
b^2+c^2=2,(2)
(2)-(1)得c^2-a^2=1 (3)
c^2+a^2=2(4)
(3) + (4) 得c^2=3/2 (5)
把(5)代入(2)得b^2=1/2 (6)
把(6)代入(1)得a^2=1/2
得出 a^2=b^2=1/2
a^2+b^2=1,(1)
b^2+c^2=2,(2)
(2)-(1)得c^2-a^2=1 (3)
c^2+a^2=2(4)
(3) + (4) 得c^2=3/2 (5)
把(5)代入(2)得b^2=1/2 (6)
把(6)代入(1)得a^2=1/2
得出 a^2=b^2=1/2