20. Complete the paragraph proof. (5 points)
Given: 21 and 22 are supplementary, and 22 and 23 are supplementary.
Prove: 21 - 23
By definition of supplementary angles, mZ1 + m2 2 = (a) and m2 + m23 = (b).
Then, mZ1 + m2 = m 22+ m23 by the
Property (c). Subtract mZ2 from each
side. You get mZ1 = (d), or 21 - (e).

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

b

step-by-step explanation: