Geometry
posted by Anonymous .
Find the area of the rhombus: In rhombus ABCD, AB=11 and AC=13. Find the area of the rhombus.
What should be done to find the values of the diagonals?

For a rhombus (equal sides), AB = BC.
AC is already one diagonal that you know. The other is
BD = 2*sqrt(11^2 6.5^2) = 17.75
The area is half the product of the diagonals. 
What does 2*sqrt mean?

2 times the square root of( )

In rhombus ABCD, AB=20 and AC=25. Find the area of the rhombus to the nearest tenth.