What is the sum of the interior angles of a decagon (10 sided polygon)?

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Also, what is the measure of each interior angle if the polygon is regular?

2006-09-06 14:09:23 · 3 answers · asked by math deficient 1 in Science & Mathematics ➔ Mathematics

I'm pretty sure it's 1440 degrees

For any polygon, just use 180(s-2), s=number of sides

2006-09-06 14:10:31 · answer #1 · answered by dennismeng90 6 · 0⤊ 0⤋

The formula for the sum of the interior angles depends on 2 less than the number of sides:

Sum = 180 * (s - 2)

= 180 * (8)
= 1440

2006-09-06 21:10:53 · answer #2 · answered by ? 6 · 0⤊ 0⤋

triangle = 180
square 360
pentagon 540
basically 180 times the number of sides minus two
so 1440

2006-09-06 21:40:33 · answer #3 · answered by applejacks 3 · 0⤊ 0⤋