This is a 30-60-90 triangle. Following the pattern of x, [tex]x \sqrt{3} [/tex], and 2x. So lets us look for that pattern in these triagles.
Judging from what I know, the answer is A and C.
They hypotenuse is 2 times the shorter leg, which is evident here. B and D are incorrect, since if the longer leg is 18, then the smaller leg would be a large square root , possibly a number in the mid 500s being squared.
Hope this helps
