savanna89
03.02.2020 •
Mathematics
What is the sum of interior angles for a nonagon
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Ответ:
The number of triangles a polygon has is represented by the formula:
(n-2)
Where "n" is the number of sides. If you ever forget what you subtract "n" by think of a triangle. It has 3 sides, so it is only logical that you should only have 1 triangle (subtract by 2). So, what is the sum of the interior angles of a triangle, 180°. So the formula looks like this:
Sum of Interior Angles = 180°(n-2)
180°(9-2)
180°(7) = 1260° is the sum of interior angles for a nonagon!
Ответ:
Step-by-step explanation:
hello :
D: (x + 9)2 + (y + 4)2 = 5