In geometry, an octahedron (plural: octahedra) is a polyhedron with eight faces. A regular octahedron is a Platonic solid composed of eight equilateral triangles, four of which meet at each vertex.It is a 3-dimensional cross polytope (shape).---Wikipedia
It is a tetrahedron pyramid
A tetrahedron
The Platonic solid known as an octahedron would fit the given description
Equilateral triangles, squares, regular pentagons.
It is a regular octahedron.
square
A net has two equilateral triangles and 3 rectangles. What solid figure might it make?
In geometry, an octahedron (plural: octahedra) is a polyhedron with eight faces. A regular octahedron is a Platonic solid composed of eight equilateral triangles, four of which meet at each vertex.It is a 3-dimensional cross polytope (shape).---Wikipedia
tetrahedron
It is a tetrahedron pyramid
equilateral triangles and regular pentagons
A tetrahedron
The Platonic solid known as an octahedron would fit the given description
10
Equilateral triangles, squares, regular pentagons.
No. A right angle would be 90 degrees; a tetrahedron is composed of four equilateral triangles, which by definition have equal angles of 60 degrees apiece.* * * * *Wrong!A tetrahedron is a solid shape enclosed by any four triangles. Only a regular tetrahedron that requires equilateral triangles. So an ordinary tetrahedron can have right angles - up to 3 of them at one vertex.