Question

Please help me fast and show all your work please thx ​

Answer 1

If the two diagonals are $d$ and $D$, the are of the rhombus is

$A=\dfrac{dD}{2}$

So, in your case, the area is

$A=\dfrac{15\cdot 35}{2}=262.5$

The other options are wrong because:

• option A doens't divide by 2, thus getting twice the area of the rhombus
• option B summed the diagonals instead of multiplying them
• option D took the difference of the diagonals.