Draw the design of 12 pentagrams from cardstock, cut the design out, fold along all the lines, then glue or tape the edges together where they meet.Know More
There are multiple templates available online. However, for a custom size, it is easy to create a template. Draw a pentagram the size of one side of the finished solid. Trace the pentagram in the middle of a piece of cardstock. Draw another pentagram on each of the five sides of the first, creating a group of six. Repeat these steps again so there is a second group of six pentagons. When assembled, there are 12 pentagons in the shape, one on top and one on bottom with 10 others around the middle.
Cut the groups of six or the template shape from the cardstock. Cut carefully so the edges of the finished solid are sharp and straight.
Use a ruler to make the folds sharp and crisp. Lay the ruler on the line to fold, then bend the cardstock up. Rub your fingernails along the crease. Continue to do this for all the edges. If the pattern used has tabs to make gluing easier, fold them as well.
Tape or glue each of the five pentagons surrounding the original one to its two neighbors, then to its corresponding piece on the other pentagon group. If there are tabs, fold them inside the shape and glue or tape. If there are no tabs, tape the pentagon sides together on the inside or outside. Continue assembling until all 12 sides are attached. The last tab might be slightly difficult, depending on your method of assembly.
A rectangular prism has 12 edges. In geometry, a prism is a solid figure with parallel ends or bases that are the same size and shape, with each side representing a parallelogram. The parallelograms in a rectangular prism are all rectangles.Full Answer >
A hexagonal prism always has 18 edges. There are six edges around the top and bottom hexagon faces, equaling 12 edges, and another six where the faces are connected on the sides, for a total of 18 edges.Full Answer >
A square pyramid has eight edges. Four of the edges are located where the faces meet each other to form the four sides, and the remaining four occur where the side faces meet the base.Full Answer >
A tetrahedron is a shape made out of four triangular faces, and it has a total of six edges. Although each of the four sides of a tetrahedron has three edges, the shape does not have 12 edges, as some of the edges are shared.This figure can also be referred to as a triangular pyramid.Full Answer >