Question 171
An electricity company installed a pole on flat ground. To fix the pole well, cables were attached to the pole, at a height of $1{,}4$ meters from the ground and the $2$ meters away from the pole, one of the cables being measured by $2{,}5$ meters, as shown in the figure. A math teacher, after analyzing these measures, stated that the pole is not perpendicular to the ground. Do you think the teacher is right? Justify your answer.