解题思路:
在
Rt
△
ABC
中,
∠
C
=
90
∘
,则有
A
C
2
+
B
C
2
=
A
B
2
,
∵
B
C
=
12
,
AC
=
9
,
∴
A
B
=
,
∵
S
△
A
B
C
=
AC
⋅
B
C
=
AB
⋅
h
,
∴
h
=
。
故选A.
A.
<>
解题思路:
在
Rt
△
ABC
中,
∠
C
=
90
∘
,则有
A
C
2
+
B
C
2
=
A
B
2
,
∵
B
C
=
12
,
AC
=
9
,
∴
A
B
=
,
∵
S
△
A
B
C
=
AC
⋅
B
C
=
AB
⋅
h
,
∴
h
=
。
故选A.
A.
<>