8^2 + x^2 = 10^2
64 + x^2 = 100
x^2 = 36
x = 6
Although you walked 4 km, the displacement is zero because you ended up back where you originally started.
I'm pretty sure that the answer is A, the line would set steeper because the value of x is larger
The simplified equation would be m^2 /3
I don’t think those are similar... not 100% sure tho. I think they need 2 matching angles to be similar.