diagonals ( n is the number of sides )
Answer:
Answer
Step-by-step explanation:
You read the question and follow and like me.
Answer:

Step-by-step explanation:
Use these formulas

Now solve

I don't think they are equivalent. try it yourself
Answer:
x = -4
Step-by-step explanation:
x = 3 - 7
x = - (7 - 3)
x = -4