Can someone help me draw a figure in math?

We're going from 1u : 3m to 1u : 9m so the new images will be three times smaller in each linear dimension.  So instead of a 3x9 box we get a 1x3 box.

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 "