Find y. (30/60/90 triangle)

sorry, i can't understand your question. will later if you describe more clearly!

: )

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

hey! so 1 (25) out of 4 (100) is 25 so your answer is 25%. it's like quarters!