The tetrahedron has 4 equilateral triangles as its faces.
a larger equilateral triangle
It would depend on the triangles, but assuming they were equilateral or isosceles, a trapezoid if alternated in a line.
a square based pyramid.
A four faced figure is a tetrahedron. If they are all congruent triangles, they are all equilateral triangles and it is a regular tetrahedron - one of the 5 Platonic Solids.
The tetrahedron has 4 equilateral triangles as its faces.
a larger equilateral triangle
A tetrahedron has four equilateral triangles as sides
It would depend on the triangles, but assuming they were equilateral or isosceles, a trapezoid if alternated in a line.
Differences: Squares have 4 sides / equilateral triangles have 3 sides. Squares have 90 degree angles / equilateral triangles have 60 degree angles. Squares have 2 diagonals / equilateral triangles have none Similarities: All sides of the shape are congruent All angles of the shape are congruent
The tetrahedron. If one of the four triangles is equilateral and all others are isosceles, then one might also call it a (triangular-based) pyramid.
a square based pyramid.
A square * * * * * No, the shape is equilateral. You can have equilateral triangles, 4-sided shapes such as rhombi, or polygons with 5 or more sides. A square is just one specific example.
A four faced figure is a tetrahedron. If they are all congruent triangles, they are all equilateral triangles and it is a regular tetrahedron - one of the 5 Platonic Solids.
Put four equilateral triangles so that each one of them has a vertex at a single point and the triangles abut one another. The shape will be 4/6 (= 2/3) of a regular hexagon.
Well, any shape with a triangular face. I assume that you mean a shape that only has (identical) triangles for faces. There are 2: the tetrahedron with 4 triangles, and the icosahedron with 20 triangles. * * * * * What about a triangular dipyramid? Two triangular pyramids stuck together along one face?
Tetrahedron