Does the information you prove that abcd is a parallelogram? explain

10. ac bisects bd
11. ab =dc, ab || dc
12.ab =dc, bc=ad
13.
answer i really need this is due tonight i'll give !

it is 10 I did it before been there done that

solution:

→c= a b , that is product of a and b is possible only when when a is m × n matrix and b is n × p matrix.

that is, number of columns of a= number of rows of b.

so, size of matrix , c= a b is , if a = (m × n)matrix

b= (n × p)matrix

then a b = [ (m × n)matrix] ×[   (n × p)matrix ]

→→c= a b= [m × p ] matrix

→→size of product a b will be equal to = number of rows of a × number of columns of b