Who ever gets this right will get a brainlest

It is a right angle because when you look at it the angle doen't form an obtuse angle and an acute angle is small so it only leaves  the right angle which is letter A.

Step-by-step explanation:

since both sides equal, there are infinitely many olutions.

x = ± 6i

step-by-step explanation:

x^2 = -36

take the square root of each side

sqrt(x^2) = sqrt(-36)

we know sqrt(ab) = sqrt(a) sqrt(b)

x = ±sqrt(36) sqrt(-1)

we know that sqrt (-1) = i

x = ± 6i