Answer:
y = x - 3; 9 diagonals
Step-by-step explanation:
Find the equation: y = x - 3
Plug in 12: y = 12 -3
Solve: y = 9
9 diagonals
Hope this helps! Plz mark brainliest
We are talking about a right triangle so the phytagoras equation can be used:



So the hypothinus is equal to approximately 8.49
4/5 is the sum of the answer. :)