That's called the "area" of the shape.
TilesAny shape can be covered with a number of similarly shaped figures such as triangles, this process is called tesselation.
Are determined by (a) the shape of the flat surface, (b) the area of the flat surface, and (c) the size of the square units.
a square
rectangle, square, equilaterals, rhombus, kite, trapezium
Square
A circle is not a number, it is a 2-dimensional shape. A number can have a square root, not a shape. So, a circle cannot have a square root!.
The shape in question is called a square pyramid.
square
square
area
A 3D shape could be:a square pyramida cubea rectangular block
The corners of a shape are called vertices.