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Phoenix [80]
2 years ago
7

In a regular polygon each interior angle is 140° greater than each exterior angle. Calculate the number of sides of the polygon​

Mathematics
1 answer:
pochemuha2 years ago
6 0

Answer:

18 sides.

Step-by-step explanation:

The interior and exterior angles sum to 180 so:

       I + E = 180

also  I - E = 140       (given)

So, adding to eliminate E:

      2I = 320

I = 160 degrees and the external angle E = 1809 - 160 = 20 degrees.

Since the sum of all exterior angles in a polygon = 360 degrees

- the number of sides = 360 / 20 = 18.

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