SOLUTION: A mirror in the shape of a regular octagon is mounted on a wall. If the area of the mirror is 18 sq. meter find: a. The length of the side of the mirror. b. If the sides of the m

Algebra ->  Polygons -> SOLUTION: A mirror in the shape of a regular octagon is mounted on a wall. If the area of the mirror is 18 sq. meter find: a. The length of the side of the mirror. b. If the sides of the m      Log On


   



Question 1013890: A mirror in the shape of a regular octagon is mounted on a wall. If the area of the mirror is 18 sq. meter find:
a. The length of the side of the mirror.
b. If the sides of the mirror are adorned by a red ribbon glued to its sides what is the length of the required ribbon?

Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
A mirror in the shape of a regular octagon is mounted on a wall. If the area of the mirror is 18 sq. meter find:
a. The length of the side of the mirror.
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For any regular polygon with n sides of length s:
Area+=+ns%5E2%2Acot%28180%2Fn%29%2F4
Solve for s.
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b. If the sides of the mirror are adorned by a red ribbon glued to its sides what is the length of the required ribbon?
Perimeter = 8s