A.
+
) ABCD is a
quadrilateral
made up of two
isosceles triangles
ABD and CBD (see
fig.). The diagonals
meet at O. BD = 12
cm; AO = 8 cm; AC = B
12.5 cm. If AB = AD
and CB = CD, find the
lengths of the sides
of the quadrilateral
O
D
с
and its area.
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