That triangle's upside down but the usual rules hold.
We know the side opposite the 39 degree angle is 10 m and we're asked for the adjacent side. The unlabeled side is the hypotenuse.
That's tangent:
Answer B
We know the side opposite the 39 degree angle is 10 m and we're asked for the adjacent side. The unlabeled side is the hypotenuse.
That's tangent:
Answer B