Contents

- 1 How do you make a tetrahedron?
- 2 What are the 5 polyhedrons?
- 3 What is the equation of a tetrahedron?
- 4 What is a 6 sided polyhedron called?
- 5 Are all sides of a tetrahedron equal?
- 6 How do you make a tetrahedron in Sketchup?
- 7 How do you draw a tetrahedron on an isometric paper?
- 8 Which has tetrahedral shape?
- 9 Is cf4 a tetrahedral?
- 10 Why is trigonal planar 120 degrees?

## How do you make a tetrahedron?

Drawing the Net of a Tetrahedron Place the point of the compass on the line in a slightly off-center position and draw a circle. Move the point of the compass to the intersection of the line and the circle and draw a second circle that overlaps the first.

## What are the 5 polyhedrons?

The five Platonic solids (regular polyhedra ) are the tetrahedron, cube, octahedron, icosahedron, and dodecahedron. The regular polyhedra are three dimensional shapes that maintain a certain level of equality; that is, congruent faces, equal length edges, and equal measure angles.

## What is the equation of a tetrahedron?

This is called the Zamolodchikov tetrahedron equation: [Y∘(1⊗1⊗B)(1⊗B⊗1)(B⊗1⊗1)][(1⊗B⊗1)(B⊗1⊗1)∘Y∘(B⊗1⊗1)][(1⊗B⊗1)(1⊗1⊗B)∘Y∘(1⊗1⊗B)][Y∘(B⊗1⊗1)(1⊗B⊗1)(1⊗1⊗B)]=[(B⊗1⊗1)(1⊗B⊗1)(1⊗1⊗B)∘Y][(B⊗1⊗1)∘Y∘(B⊗1⊗1)(1⊗B⊗1)][(1⊗1⊗B)∘Y∘(1⊗1⊗B)(1⊗B⊗1)][(1⊗1⊗B)(1⊗B⊗1)(B⊗1⊗1)∘Y].

## What is a 6 sided polyhedron called?

The six – sided cube is also called a hexahedron. A polyhedron with six rectangles as sides also has many names—a rectangular parallelepided, rectangular prism, or box.

## Are all sides of a tetrahedron equal?

A regular tetrahedron is a tetrahedron in which all four faces are equilateral triangles. In a regular tetrahedron, all faces are the same size and shape (congruent) and all edges are the same length.

## How do you make a tetrahedron in Sketchup?

Follow these steps:

- Create a square with the Rectangle tool.
- Extrude the square into an equal sided cube using the Push/Pull tool.
- Draw lines as shown in the image below by snapping to the corners of the cube.
- Delete corners of the cube using the Erase tool on four sides to expose the tetrahedron.

## How do you draw a tetrahedron on an isometric paper?

Hint: We first take two dots A,B on the isometric graph paper and join AB. We take a dot above AB as C and then join AC and BC. We take a dot D inside the triangle ABC and then join AD,BD,CD.

## Which has tetrahedral shape?

Tetrahedral Geometry Molecules of methane, CH_{4}, ammonia, NH_{3}, and water, H_{2}O, all have four electron groups around their central atom, so they all have a tetrahedral shape and bond angles of about 109.5°.

## Is cf4 a tetrahedral?

In NH4+ion four bond pairs are present. The repulsion between bond pairs is less as compared to the bond pair-lone pair repulsion. Therefore the geometry is tetrahedral.

## Why is trigonal planar 120 degrees?

The central and surrounding atoms in a trigonal planar molecule lie on one plane (hence the term planar ). This gives it more of a two-dimensional shape than three-dimensional. The bonds are spread equally around the plane, forming 120 degree bond angles.