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Mathematics
Problem
Quadrilateral
A
B
C
D
ABCD
A
B
C
D
has diagonal
A
C
=
9
cm
AC = 9\,\text{cm}
A
C
=
9
cm
. In
△
A
B
C
\triangle ABC
△
A
B
C
, the perpendicular distance from
B
B
B
to
A
C
AC
A
C
is
6
cm
6\,\text{cm}
6
cm
. In
△
A
D
C
\triangle ADC
△
A
D
C
, the sides are
A
D
=
8
cm
AD = 8\,\text{cm}
A
D
=
8
cm
and
D
C
=
7
cm
DC = 7\,\text{cm}
D
C
=
7
cm
. Determine the area of
A
B
C
D
ABCD
A
B
C
D
to one decimal place.
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