I am confused and need help. Please explain how you got your answer

Answer A (or C. Both were very close)

Step-by-step explanation:

I don't know what "please only answer if you know not to ask a question" means.

Since ∠ADB is 90° and ∠BAD is 36°, then ∠ABD is 180-90-36 or 54°.

You could just try using the Pythagorean Theorem for all the answer choices.

(a²+b²=c² where a and b are the legs and c is the hypotenuse)

A.

11²+8²=c²

121+64=c²

c=

c ≈ 13.60

B.

I don't need to prove this because the shorter legs' sum is greater than the hypotenuse and will not make a triangle.

C.

15.1²+11²=c²

288.01+121=c²

c=

c ≈ 18.68 ≈ 18.7

D.

I don't need to prove this because the shorter legs' sum is greater than the hypotenuse and will not make a triangle.

I think answer A is the best since it rounds closer to the answer in the row. It was pretty close between C and A so you can decide if you'd like but I suggest A because it's a closer rounding.

answer: b.

step-by-step explanation:

the y coordinate for point b is 0, and answer b is the only one with that y coordinate.