Question

What is the sum of the angle measures in a polygon that has 20 sides?

Answer 1

use the formula.

Answer 2

\[(x-2)*180\]

Answer 3

where x is the number of sides.

Answer 4

are the number of sides*

Answer 5

180(x-2)
180(18)
3240degrees

Answer 6

Runner, no it isnt. LOL.

Answer 7

its for 4 sided.

Answer 8

Sum of exterior angles of any polygon is 360 degrees.
Each exterior angle of a regular polygon = 360/n where n is the number of sides.
So, n = 360/20 = 18.

OR

Each interior angle of the regular polygon is 180-20 = 160 degrees
So, sum of interior angles of the regular polygon = 160n degrees where n is the number of angles (also the number of sides)
Now, sum of interior angles of any polygon = (n-2)x180 degrees
Thus 160n = (n-2)x180 or 160n = 180n - 360
Solving for n, we get n = 18.