0
Still curious? Ask our experts.
Chat with our AI personalities
Vivi
Rene
BeauA pyramid is a solid shape with a polygon base and triangular faces that meet at an apex. The base need not be a square as is often assumed in many of the answers here.
For a pyramid with a base that is a polygon with r sides where r is an integer greater than 2, the nth pyramidal numbe is:
P(r, n) = [(3n2 + n3*(r-2) - n(r - 5)]/6
Add your answer:
Earn +20 pts
Is NH3 a trigonal pyramidal?
It is pyramidal in shape.It has a lone pair.
What is pyramidal number sequence?
It is a sequence in which the numbers represent the number of spheres in a pyramidal stack of spheres. There are a number of possible configurations for stacking spheres - a visit to fruit stalls may show you options. The square based pyramidal numbers are given by the sums of the first n square numbers. So U(1) = 1^1 = 1 U(2) = 1^2 + 2^2 = 1 + 4 = 5 and so on U(n) = 1^2 + 2^2 + ... + n^2 = n(n+1)(2n+1)/6. However, there are also triangle based pyramidal numbers and hexagon based pyramidal numbers, since these configuration also give stable stacks.
What is the shape of BrF5?
Square pyramidal
What is the molecular geometry of PH3?
Trigonal Pyramidal
What is the molecular geometry of tef5?
square pyramidal
