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GaryK [48]
3 years ago
10

The perimeter of an octagon is 32 inches and its longest side is 6 inches. What is the longest side of a similar octagon with a

perimeter of 24 inches ?
Mathematics
1 answer:
Bingel [31]3 years ago
4 0

bearing in mind that the perimeter of two similar figures are at a ratio, which is the same ratio is their sides.


\bf \cfrac{\textit{small octagon}}{\textit{large octagon}}\qquad \cfrac{perimeter}{perimeter}\implies \cfrac{24}{32}\implies \cfrac{3}{4}\implies 3:4 \\\\\\ \cfrac{\textit{small octagon}}{\textit{large octagon}}\qquad \cfrac{side}{side}\qquad \cfrac{x}{6}=\cfrac{3}{4}\implies 4x=18\implies x=\cfrac{18}{4}\implies x=\cfrac{9}{2}

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The distributive property lets you multiply a sum by multiplying each addend separately and then add the products.

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