At that time it was called 'The Land of Yan and Zhao', because its northern area was dominated by the Kingdom of Yan, while its southern area was occupied by the Kingdom of Zhao. Today, that same area is home to more than 50 minority ethnic groups, such as Han, Hui, Manchu, Mongolian and Korean.
Pentagonal Prism Formula 1  : Area of Base(A) = Â½ * a * 5 * s Perimeter of Base(P) = 5s Surface Area of Prism = 5as + 5sh = 5as + Ph Volume of Prism = (5/2)ash = Ah. 2  a = apothem length, s = side, h = height.
Regular pentagons[edit] A regular pentagon has SchlÃ¤fli symbol {5} and interior angles are 108Â°. A regular pentagon has five lines of reflectional symmetry, and rotational symmetry of order 5 (through 72Â°, 144Â°, 216Â° and 288Â°). The diagonals of a convex regular pentagon are in the golden ratio to its sides.