If you still need to know, which I'm guessing you don't, you just use the 1/2(d1d2), but you can find d2 by using the pythagorean theorem. 17^2=15^2+x^2

Rhombus Area = hs

= s2 sin A

= s2 sin B

= (½) d1d2

s = side length of rhombus

h = height of rhombus

d1 = long diagonal of rhombus

d2 = short diagonal of rhombus

You haven't mentioned the other diagnola. Rhombus has two unequal diagonal. Unlike rectangle.

Look at the formula of area of rhombus.>>>

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= s2 sin A

= s2 sin B

= (½) d1d2

s = side length of rhombus

h = height of rhombus

d1 = long diagonal of rhombus

d2 = short diagonal of rhombus

You haven't mentioned the other diagnola. Rhombus has two unequal diagonal. Unlike rectangle.

Look at the formula of area of rhombus.>>>

www.mathwords.com