i believe it’s D.
this is because the triangle is a right triangle. right triangles are 90 degrees.
1. add 80+2 that equals 82.
2. subtract 82 by 90, that gives you 8.
3. divide 8 by x (x is like 1)
8/1=8
i dont really know how to explain it well, sorry! hopefully my work makes sense, if you have any questions about it, feel free to ask me! :)
here’s how you should solve it: