The total number of diagonals of an N-gon is 77, then what is N? The total number of diagonals of an N-gon is 77, then what is N? A. 14 C. 8 B. 11 D. 5 Log in or register to post comments Solution Click here to… Jhun Vert Fri, 07/05/2024 - 05:30 Solution Click here to expand or collapse this section $D = \frac{1}{2}n(n - 3)$ $77 = \frac{1}{2}n(n - 3)$ $n^2 - 3n - 154 = 0$ $n = 14 ~ \text{and} -11$ Log in or register to post comments
Solution Click here to… Jhun Vert Fri, 07/05/2024 - 05:30 Solution Click here to expand or collapse this section $D = \frac{1}{2}n(n - 3)$ $77 = \frac{1}{2}n(n - 3)$ $n^2 - 3n - 154 = 0$ $n = 14 ~ \text{and} -11$ Log in or register to post comments
Solution Click here to…