In learner-centred methods, the teacher/instructor is both a teacher and a learner at the same time. In the words of Lawrence Stenhouse, the teacher plays a dual role as a learner as well âso that in his classroom extends rather than constricts his intellectual horizonsâ.
Two-point perspective has one set of lines parallel to the picture plane and two sets oblique to it. Parallel lines oblique to the picture plane converge to a vanishing point, which means that this set-up will require two vanishing points. Walls in 2-point perspective, converging toward two vanishing points.
Two geodesics belonging to the same plane can either be: 1  intersecting, if they intersect in a common point in the plane, 2  parallel, if they do not intersect in the plane, but converge to a common limit point at infinity (ideal point), or. 3  ultra parallel, if they do not have a common limit point at infinity.