Four Right angles are in a solid square because a square has four sides
A four-sided solid is called a tetrahedron.
2 dimensional (plane) figures can have three or more straight edges as sides. 3 dimensional (solid) figures can have four or more plane sides (faces). They can have fewer sides if the sides are not straight.
A solid with three sides is a cylinder.
A "six sided shape" is a hexagon. The solid formed by 6 squares is a cube (four sides, top, bottom).
Four Right angles are in a solid square because a square has four sides
A four-sided solid is called a tetrahedron.
A Tetrahedron has four triangular sides.
A solid with triangular sides is a "pyramid". (The pyramids in Egypt have four sides and a square base.)
The answer is a pyramid.
Pyramid. Work: 4 sides (that you usually see) are triangles, the base (bottom) is a square
a quadrilateral
The surface of a solid. A square has four sides. A cube has six faces.
2 dimensional (plane) figures can have three or more straight edges as sides. 3 dimensional (solid) figures can have four or more plane sides (faces). They can have fewer sides if the sides are not straight.
A solid with three sides is a cylinder.
It seems to be called a solid quadrilateral, or a three-sided pyramid. By Nicolas Mackie
A rhombus is a four sided solid figure in which all opposite facing sides are parallel to each other.