Consider the standard matrix of a counterclockwise rotation of a vector in R 2:

The rotation matric that rotate the plane counter clockwise around the origin is given in the attached file

Step-by-step explanation:

The composition of transformation is given by

a net is a diagram that shows a “flattened” view of a solid. in a net, each face and base is shown with all of its dimensions. a net can also serve as a pattern to build a three-dimensional solid.

a pyramid is a three-dimensional object with a base that is a polygon and triangular faces that meet at one vertex.

" the net of a triangular pyramid consists of four triangles. the base here we are given of the pyramid is a equilateral   triangle, and the lateral faces are also triangles "