I can't read that language but I'll guess it says write a second degree equation then solve for n when d=10.



Answer: n² - 3n - 20 = 0
That doesn't factor so there is no integer n solution.
That means there are no polygons with 10 diagonals.

200 is wrong because I just need to answer this question to finish my profile fully!
Answer:
91/4 or 22 3/4
Step-by-step explanation: i just know