初中广场真题数学
问题1
问题2
AOB是等腰直角三角形且∠B = 45°,由此得出BO=1,即OB ' = 1;
OC = BC-OB = & gt;根号2-1;
CB ' = OB '-OC = & gt;1-(根号2-1)= >2-根号2
问题3
e的x = CB '/2+oc = >根号2-1+(2-根号2)/2
e的y = ao-ad/2 = > 1-(根号2)/2
所以e(根号2-(根号2)/2,1-(根号2)/2)
问题2
AOB是等腰直角三角形且∠B = 45°,由此得出BO=1,即OB ' = 1;
OC = BC-OB = & gt;根号2-1;
CB ' = OB '-OC = & gt;1-(根号2-1)= >2-根号2
问题3
e的x = CB '/2+oc = >根号2-1+(2-根号2)/2
e的y = ao-ad/2 = > 1-(根号2)/2
所以e(根号2-(根号2)/2,1-(根号2)/2)