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OpenStudy (anonymous):
A regular octagon has side length 10.9 in. The perimeter of the octagon is 87.2 in cm and the area is 392.4 in2. A second octagon has side lengths equal to 5.45 in. Find the area of the second octagon. Please help
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OpenStudy (anonymous):
@stgreen do you know this one?
OpenStudy (mathstudent55):
When the sides of polygons are related by a scale factor, the areas are related by the square of the scale factor.
OpenStudy (anonymous):
I still don't get how to do it
OpenStudy (mathstudent55):
|dw:1375772657776:dw|
OpenStudy (mathstudent55):
Look at the figure.
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OpenStudy (mathstudent55):
There are two squares. The square at left with side of 6 cm has an area of 36 cm^2. The square at right with side 3 cm has an area of 9 cm^2. Ok so far?
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