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yaroslaw [1]
3 years ago
10

The sum of the measure of the interior angles of a polygon is 1980°. What polygon is it?

Mathematics
1 answer:
Gwar [14]3 years ago
8 0
Answer:

tridecagon/triskaidecagon

Explanation:

sum of interior angles= <span>180<span>(n−2)</span></span> degrees, n being the number is sides in the polygon.

sum of interior angles= 1980

<span>180<span>(n−2)</span>=1980</span>

divide by 180:

<span>n−2=<span>1980180</span>=11</span>

add 2:

<span>n=11+2=13</span>

If a polygon has 13 sides, it is called a tridecagon or a triskaidecagon.


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