解题思路:
∵
A
B
=
8
,
BC
=
6
,
∴
B
D
=
=
10
,根据折叠可得:
AD
=
A
′
D
=
6
,
∴
A
′
B
=
10
﹣
6
=
4
,设
AE
=
,则
A
′
E
=
,
BE
=
,在
Rt
△
A
′
E
B
中:
,解得:
。故答案为:
3.
3.
<>
解题思路:
∵
A
B
=
8
,
BC
=
6
,
∴
B
D
=
=
10
,根据折叠可得:
AD
=
A
′
D
=
6
,
∴
A
′
B
=
10
﹣
6
=
4
,设
AE
=
,则
A
′
E
=
,
BE
=
,在
Rt
△
A
′
E
B
中:
,解得:
。故答案为:
3.
3.
<>