(1) Find the length of AE when m= 1.
(2) When 0
(3) Is there an m value that makes □DEFA a diamond? If it exists, write the value of m directly; If it does not exist, please explain why.
(This question is 14)
(1) solution: when m= 1, OC= 1, BC=2.
∴△BCE∽△BAO ∴ ∴
∴∴ ..........................4.
(2) Solution: When 0
When □ Germany and France are rectangular, then ED⊥x axis.
∴△ADE∽△AOB ∴ ∴
From the calculation of (1), we can know Ⅷ. ................................................................................................................................................
∴∴ ............................. 2 points.
When point m>2 and point D are on the right side of point A, then ∠ EDA < ∠EAO.
∴∠EDA can't be 90 years old, and ∴∴∴∠∠∠∠∠∠∠∠∠∠∠∠∠∠∠∠.
(3) or ... 4 points.