We can add two matrices having real numbers A and B if their?

Sum of all angles around a main point equals to?

We can subtract two matrices A and B if their?

If A and B matrices are of same order and A + B = B + A, this law is known as?

Two lines that make an angle are called?

Vertical angles that are opposite to each other are also?

If the sum of two matrices A and B is zero matrix, then A and B are said to be?/

If A, B and C matrices are of same order and (A + B) + C = A + (B + C), this law is known as?

Angles that are opposite to each other are called?