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There is no simple answer.
For an equilateral triangle it is 6.9282/s where s is the length of each side.
For a square it is 4/s
A regular pentagon: 2.9062/s
A regular hexagon: 2.3094/s and so on.
The ratio for a circle is 2/r where r is the radius.
For irregular polygons there is no rule.
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How do scale factor and ratio of perimeters compare?
The sacle factor between two shapes is the same as the ratio of their perimeters.
Ratio of perimeters given ratio of similitude?
They are the same.
What are two different size squares that the ratio of their perimeters is the same as the ratio of their areas?
Assume square A with side a; square B with side b. Perimeter of A is 4a; area of A is a2. Perimeter of B is 4b; area of B is b2. Given the ratio of the perimeters equals the ratio of the areas, then 4a/4b = a2/b2; a/b = a2/b2 By cross-multiplication we get: ab2 = a2b Dividing both sides by ab we get: b = a This tells us that squares whose ratio of their perimeters equals the ratio of their areas have equal-length sides. (Side a of Square A = side b of Square B.) This appears to show, if not prove, that there are not two different-size squares meeting the condition.
What is the ratio 15ft to 9ft of the perimeters?
5:3
How do you find the ratio of areas?
You calculate the areas of two shapes and then divide one area by the other to find the ratio of their areas.
