Answer:

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We know that 
Also , 
So ,

Answer:
Check photo
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Answer:
C & D
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Both have an odd amount of numbers, meaning there is a perfect middle.
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he sum of the angles in all these triangles will be n x 180 degrees. The sum of the angles around the interior point is clearly 360 degrees, so the sum of the polygon’s angles will be (180n)-360 = (n-2) x 180 degrees.Here we have (n-2) x 180 = 2160, so n-2 = 12. So the polygon has 14 sides. 606 views
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