(Originais Teachy 2023) - Question Medium of Mathematics

During a geometry class, the students were given the task of analyzing the map of a triangular terrain where they planned to build a leisure area. They found that two of the internal angles of the terrain measure 45º and 70º, respectively. (a) What is the measure of the third internal angle of the terrain? (b) If the students want to install a slide on the terrain that occupies one of the internal angles, what should be the measure of the angle at the base of the slide? (c) If all three internal angles of a new triangular terrain are equal, what type of triangle would they have?