Another 100 pt question, so whoever wants it, answering both parts of the question.

11.

10.

Step-by-step explanation:

In every rectangle, when you have two diagonal segment bisectors, you will always have a circumcentre showing all midpoints of both segment bisectors, however, it measures 120° going vertical and 60° going horisontal, so with that being said, you have your answers.

I am joyous to assist you anytime.

* NOTE: Remember, the sum of the interior angles of ALL TRIANGLES is 180°.

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