thomasfisherman thomasfisherman
  • 19-09-2020
  • Mathematics
contestada

Can a 10 sided polygon have exactly 21 diagonals? Use the formula n(n-
3)/2 *

Respuesta :

CSMedrano
CSMedrano CSMedrano
  • 19-09-2020

Answer:

No

Step-by-step explanation:

for a n-agon the formula is

[tex]\frac{n(n-3)}{2}[/tex]

so in our case n=10

[tex]\frac{(10)(10-3)}{2} \\\\=\frac{10*7}{2} \\\\=5*7\\\\=35[/tex]

so no, a 10 side polygon has exactly 35 diagonals

Answer Link

Otras preguntas

All of the following are examples of graphic design EXCEPT A. a painting B. a newspaper C. an illustrated manual D. on online advertisement
Find the slope of the line shown below.​
Where do you get most of your news, and how do you analyze what you hear, view, or read on media outlets
which skill is considered the cornerstone of effective communication?
Analyze the argument made in this passage. Corals, the small sea creatures that form the spectacular coral reefs, are also endangered by global warming. As the
The Thakor Corporation’s purchases from suppliers in a quarter are equal to 75 percent of the next quarter’s forecasted sales. The payables period is 60 days. W
A scale model of a rectangular living room is 6 3/4 inches by 5 1/2 inches. If 1 inch represents 3 feet of the actual room, find the area of the actual room.
A group of 15 people are ordering pizza each person wants 2 slices and each pizza has 3 slices how many pizzas should they order
How can you multiply fractions and mixed numbers?​
PLEASE HELP DUE NOW