Answer:
60 cm^2
Step-by-step explanation:
To find the missing diagonal we use pythagorean formula.
8^2+x^2=17^2
64+x^2=289
x^2=225
x=15 So, the missing length is 15 cm.
The formula for the area of a rhombus is the product of 2 diagonals divided by 2.
8(15)/2= 60.
