[![enter image description here](https://i.stack.imgur.com/CtW3f.png)](https://i.stack.imgur.com/CtW3f.png)

To find length of side $SV$ I used Pythagoras theorem which gave $SV=17$.
To find angle $SVW$ I added $45$ to $90 = 135$
to find side length $SW = 17^2+24^2-2 \cdot 17 \cdot 24 \cdot \cos135=37$
and lastly, to find area of the triangle I used Heron's formula $\sqrt{39(39-17)(39-24)(39-37)} = 160$ but the correct answer is $56.25$