They are called polygons
Regular tessellations can be made using triangles, squares, and hexagons.
a geometric shape made up of 20 triangles. :)
It doesn't exist. The least number of sides for a 3-D shape only made of triangles is 4.
An octagonal pyramid has eight triangles on an octagonal base. An octahedron can also be made by putting a square pyramid on another inverted square pyramid. This shape has just eight triangles and no others.
It is a 26-hedron and there are more than one configurations for the shape.
A cube
The shape is a triangular prism. This is a 3-dimensional polygon with two ends that are triangles and three rectangular sides connecting them.* * * * *FYI, a 3-dimensional polygon is known as a polyhedron.
The shape that has 3 squares and 2 triangles is a pentagon. A pentagon is a five-sided polygon with five angles. In this case, the pentagon is made up of 3 squares, each contributing 4 sides, and 2 triangles, each contributing 3 sides. Therefore, the total number of sides in this pentagon would be 3 squares (12 sides) + 2 triangles (6 sides) = 18 sides.
A cube is made out of squares ONLY. A Pyramid is out of triangles and sometimes with squares.
a star
A pyramid could be constructed from 4 or more triangles.
Polygon
A regular tetrahedron
No. Platonic solids, as their name suggests, are 3-dimensional objects. A triangle is 2-dimensional.
It is a three dimensional figure of some sort.
A dodecagon is a 12 sided shape made from 10 triangles