Respuesta :

DeanR

1a.

The total of the exterior angles of a polygon is always 360 degrees.

So if each one is 40, that's 360/40 = 9 sides

Answer: 9 sides

1b.

178 degree interior angle means a two degree exterior angle so 360/2 = 180 sides.

Answer: 180 sides

2.

A decagon is a 10 gon, so external angles 360/10 = 36 degrees and internal angles that are the supplement, 144 degrees.

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