Imagine a pyramid, with a triangle shaped base, with three sides coming up each of which is a triangle. That is a tetrahedron (4 sides, all the same side, with each one the shape of a triangle).
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Mostly correct, but the four faces need not all be the same.
A tetrahedron is 3-dimensional and so it looks just like an ordinary tetrahedron.
It will look like a 2D equilateral triangle if it is a triangular based pyramid which is called a tetrahedron.
Well, a tetrahedron has four sides. A regular tetrahedron is a triangular pyramid.
A tetrahedron must be plane faced and so, it is just an ordinary tetrahedron.
"Vertices" means corners. "Tetra" means four and "hedron" means side, so a tetrahedron is a four sided object. A tetrahedron looks like pyramid. Each side is a triangle. The bottom of a tetrahedron is a triangle, and a tetrahedron goes up to a point at the top. The three corners of the triangle at the bottom plus the point at the top gives you a total of four corners.
A tetrahedron is 3-dimensional and so it looks just like an ordinary tetrahedron.
It doesn't "look like" anything, because it's far too small to interact much with visible light. The overall shape is, well, a tetrahedron. If you don't know what a tetrahedron is, think about what a pyramid would look like if it had a triangular base instead of a square one and you'll be pretty close.
In geometry, an octahedron is a polyhedron with eight sides. A regular octahedron is the dual polyhedron of a cube; It is a rectified tetrahedron.
A tetrahedron looks like a pyramid but instead of having a square base, it has a triangular base.
A pyramid with a triangle as base is considered as a tetrahedron. It is a three dimensional polyhedron with 4 equilateral triangles as its sides. If one would look at the word tetrahedron, it literally means "with four planes".
A tetrahedron.
It will look like a 2D equilateral triangle if it is a triangular based pyramid which is called a tetrahedron.
I am not a tetrahedron!
A tetrahedron has 4 faces but it doesn't look like a rectangle standing up. It is formed by 4 triangular faces.
A tetrahedron has 4 faces.
Well, a tetrahedron has four sides. A regular tetrahedron is a triangular pyramid.
A tetrahedron must be plane faced and so, it is just an ordinary tetrahedron.