In this article, the author designs a teaching situation: developing formula to calculate the distance from a point to a plane in space. In these situations, all learning activities of students will have been planned by the teacher. The formula to calculate the distance from a point to a plane will be created through the process of two different student's activities: the first is the process of determining the distance in synthetic geometry and the second is the similarity in the formula for calculating the distance from a point to a line in the plane (something that students already know). In this teaching situation, students learn through their own activities but in a manner that was part of the teacher's plan. In the process of implementing the scenario, from time to time teachers will need to orient students at a minimum level in such a manner that students will find the desired formula.