What is the total measure of all of the interior angles of a decagon?
Is it 360
I thought so, too. But these sites point out that the total measure of all of a decagon's interior angles is 1440.
http://www.coolmath.com/reference/polygons.html
(Broken Link Removed)
No, the total measure of all the interior angles of a decagon is not 360 degrees. To find the total measure of all the interior angles of any polygon, you can use the formula:
Total measure = (n - 2) × 180 degrees
In this formula, "n" represents the number of sides of the polygon.
For a decagon, which has 10 sides, the calculation would be:
Total measure = (10 - 2) × 180 degrees
= 8 × 180 degrees
= 1440 degrees
Therefore, the total measure of all the interior angles of a decagon is 1440 degrees.