The angle of depression from the ranger at point A and the angle of elevation from the fire on the ground at Point C are congruent (interior opposite angles).
The distance from the ranger up in the tower to the fire on the ground is the hypotenuse AC of the right triangle ABC.
probablity=desiredoutcome/totalpossibleoutcomes there are 6 total desired outcomes (3 on each cube) total possible, there are 6*6 or 36 total possible outcomes so 6/36 or 1/6 chance