Usually not, but it can.
A tetrahedron has 6 edges
In a triangular-based pyramid, also known as a tetrahedron, the edges connecting the apex to the base vertices are not necessarily perpendicular to the base edges. However, the edges of the triangular base itself are not perpendicular to each other unless the triangle is a right triangle. Therefore, while some configurations may have perpendicular edges, it is not a general characteristic of all triangular-based pyramids.
A tetrahedron has:4 faces4 vertices6 edges
A tetrahedron has no parallel edges. In a tetrahedron, which is a three-dimensional shape with four triangular faces, each pair of edges connects different vertices, ensuring that no two edges run parallel to each other. Thus, all six edges of a tetrahedron are distinct and not parallel.
A tetrahedron triangular based pyramid has 6 edges, 4 faces and 4 vertices
A bialtitude is a line perpendicular to two opposite edges of a tetrahedron.
A tetrahedron does not normally have any verticals but it can have three [mutually] vertical edges at one vertex, or two sets of mutually perpendicular edges at two vertices.
No and Yes A regular tetrahedron does not have any faces that are perpendicular to each other. (Regular in this sense means all edges are equally long - all faces are equilateral triangles)You can construct a irregular tetrahedron with two or three perpencdicular faces. To make such a tetrahedron with three faces perpendicular, simply cut the corner of a cube.
A tetrahedron has 6 edges.
A tetrahedron has 6 edges
The base of a tetrahedron has three edges.
hemisphere
A tetrahedron has:4 faces4 vertices6 edges
6 edges
It has 8 edges.
6 of them.
18 edges