show that the product of two triangular matrices is itself triangular

A triangular prism has

Show that If the product of two matrices is a zero matrix, it is not necessary that one of the matrices is a zero matrix.

A triangular age pyramid has

If the product of two non null square matrices is a null matrix; show that both of them must be singular matrices.

Find the volume of the triangular prism shown in the diagram.

Null matrix upper triangular matrix and lower triangular matrix

Which of the following is a triangular matrix? (A) a scalar matrix (B) a lower triangular matrix (C) an upper triangular matrix (D) a diagonal matrix

In a square matrix A=[a_(ij)] if igtj and a_(ij)=0 then matrix is called Square matrix Lower triangular matrix Upper triangular matrix Unit matrix