It has 540 degrees because a five sided polygon has three triangles in it, and sinnce a triangle equals 180 degrees, 3 x 180= 540.
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A 5 sided polygon is a pentagon
I think u wanted to say 5 sided polygon & not 5 shaped polygon And a 5 sided polygon is a pentagon (penta meaning 5). hexagon is a 6 sided polygon
A five sided polygon is known as a pentagon. A regular pentagon has five even sides and five internal angles at 108 degrees each.
The sum is 540 degrees, each angle being 108 degrees.In general, in an n-sided polygon, the sum of the angles is 180 (n-2).
A 5-sided polygon is called a pentagon.