A 5 sided shape with 5 angles is a pentagon
assuming you meant a pentagon (as i have never heard of a pentgon and neither has google), it is a two dimensional shape with five sides and five angles
It is a regular polygon.
The name for a three-dimensional diamond shape is a "diamond." In geometry, a diamond is a type of parallelogram with four sides of equal length forming two pairs of congruent angles. It is also known as a rhombus, with all sides equal in length but with the angles not necessarily right angles.
Three-dimensional. It has height, width and depth.
circle
A two-dimensional shape (polygon) is said to be "regular" (or equilateral) if all its sides are the same length and all its angles are the same angle. A regular pentagon, for example, has 72-degree angles on all five angles, and all its five sides are the same length.
A polygon; specifically a tetragon. A two-dimensional shape with four equal sides and four right angles is a square. A two-dimensional shape with two sets of equal sides and four right angles is a rectangle. A two-dimensional shape with two sets of equal sides and two sets of equal angles is a parallelogram. A parallelogram where each opposite angel bisects the shape is a rhombus. A two-dimensional shape with one set of equal, parallel sides and two sets of equal angles is a trapezoid. A three-dimensional shape with four triangular faces is a tetrahedron.
a heptagon
They are said to be irregular shapes or polygons
Squares and rectangles have a two-dimensional shape with four sides and four right angles.
Assuming it is a two dimensional shape, 12 sides implies 12 angles (interior or exterior).
A 5 sided shape with 5 angles is a pentagon
If the shape has 3 angles in all, where two of the angles are acute, then the shape is a scalene triangle.
If the shape is two-dimensional then it is a circle, if the shape is three-dimensional then it's a sphere.
No, they are two-dimensional.
The inside of a two-dimensional shape is called its interior.