Diagonals = n(n-3)/n where n is the number of sides
if a polygon have 10 sides
= 10(10-3)/10
= 7
thus, the polygon have 7 diagonals.
Answer:
hello i used this website called math-way and found the answer
x
=
−
3
Answer:
21
Step-by-step explanation:
28/x=8/6
oopsie if im wrong
Answer/Step-by-step explanation:
A. 
Using b = 2

Using b = 4

Using b = 6

Using b = 8

Using b = 10

Using b = 2

B. 
Using x = 3

Using x = 5

Using x = 7

Using x = 9

Using x = 11

Using x = 13

C. 
Using a = 2

Using a = 3

Using a = 4

Using a = 5

Using a = 6

Using a = 7

D. 
Using y = 2

Using y = 3

Using y = 5

Using y = 10

Using y = 8

Using y = 6
