Tetrahedron
When an isosceles triangle is rotated 360 degrees around its altitude, it forms a three-dimensional figure known as a cone. The altitude acts as the height of the cone, while the base of the triangle becomes the circular base of the cone. The two equal sides of the triangle create the slant height of the cone.
A triangle with a square base is not a standard geometric term, but it can be described as a triangular prism if referring to a three-dimensional shape with a triangular top and a square base. If you mean a two-dimensional figure, it might be more accurately described as a right triangle or an isosceles triangle depending on the specific dimensions and angles. In general, the combination of a triangle and a square base does not have a specific name.
pyramid
It could be a pyramid.
A triangular pyramid is a three dimensional figure whose base is a triangle in shape. Triangular pyramids also have three side faces that are also triangles, four vertices, and six edges.
A three dimensional triangular figure with three faces and a base is called a triangular pyramid. It has four vertices, four faces, and six edges.
A tetrahedron is a three-dimensional figure with four equilateral triangles. Every pyramid with a triangle as the base is a tetrahedron.
When an isosceles triangle is rotated 360 degrees around its altitude, it forms a three-dimensional figure known as a cone. The altitude acts as the height of the cone, while the base of the triangle becomes the circular base of the cone. The two equal sides of the triangle create the slant height of the cone.
A triangle with a square base is not a standard geometric term, but it can be described as a triangular prism if referring to a three-dimensional shape with a triangular top and a square base. If you mean a two-dimensional figure, it might be more accurately described as a right triangle or an isosceles triangle depending on the specific dimensions and angles. In general, the combination of a triangle and a square base does not have a specific name.
Because the base of a cone is round, it is the only three dimensional figure with only one vertex.
pyramid
pyramid or cone
It could be a pyramid.
A triangular pyramid is a three dimensional figure whose base is a triangle in shape. Triangular pyramids also have three side faces that are also triangles, four vertices, and six edges.
There is no such thing as a 3-dimensional triangle. A triangle is a 2-dimensional figure. So, depending on what you mean exactly, the volume can vary. In the case of a pyramid - whether it has a triangular base, a rectangular base, or any other base - the volume is (1/3) Bh, that is, 1/3 times the area of the base times the perpendicular height.
A three-dimensional figure with a polygon base and triangular faces that meet at a common vertex is called a pyramid. The base can be any polygon, such as a triangle, square, or pentagon, and the apex is the common vertex where all the triangular faces converge. Pyramids are named based on the shape of their base, such as triangular pyramids or square pyramids.
Cone