I think its -5 so 5 - 10 = -5
I think it’s b it only makes since
<span>Unless you are talking about the triangle thing, then its 90°.</span>
One approach that might be a great help would be if you would look
at the choices ... those things at the bottom of the question that you
didn't give us.
-- One leg is 3 times the length of the other leg.
-- Any right triangle that has one leg three times as long as the other
leg is similar to this triangle.
I'll bet that if you look through the choices, you'll find one there.
