20/06/18 01:24:07.62 TB2iTi93.net
前>>891
>>923
OA'=√(OA^2+AA'^2)
=√2=OB
OB'=√(OB^2+BB'^2)
=√(2+1)
=√3=OC
OC'=√(OC^2+CC'^2)
=√(3+1)
=2=OD
OD'=√(OD^2+DD'^2)
=√(2^2+1^2)
=√5=OE
∴CE=OE-OC
=√5-√3……(3)
20/06/18 01:24:07.62 TB2iTi93.net
前>>891
>>923
OA'=√(OA^2+AA'^2)
=√2=OB
OB'=√(OB^2+BB'^2)
=√(2+1)
=√3=OC
OC'=√(OC^2+CC'^2)
=√(3+1)
=2=OD
OD'=√(OD^2+DD'^2)
=√(2^2+1^2)
=√5=OE
∴CE=OE-OC
=√5-√3……(3)