Question 24
Angles and PolygonsAn (n − 2)2-sided figure has n diagonals. Find the number n of diagonals for a 25-sided figure.
- A.7
- B.8
- C.9
- D.10
Show the answer and explanation
Answer: A (7)
Explanation
Set (n − 2)² = 25, so n − 2 = 5 and n = 7.
An (n − 2)2-sided figure has n diagonals. Find the number n of diagonals for a 25-sided figure.
Answer: A (7)
Set (n − 2)² = 25, so n − 2 = 5 and n = 7.