10. The sum of the interior angles of a polygon is 2,340 degrees. How many sides does the polygon have?

The regular polygon that has an interior angle sum of 2,340 is a regular polygon with 15 sides. so your answer is 15.

i used to know how to do this in 7th but i forget easily

step-by-step explanation:

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