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OpenStudy (kymber):
HELP ME PLEASE ಥ_ಥ The ratio of the areas of two similar polygons is 16:25. If the perimeter of the first polygon is 20 cm, what is the perimeter of the second polygon?
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jimthompson5910 (jim_thompson5910):
If the ratio of the two areas is 16:25, then the ratio of the sides is 4:5 (you take the square root of each component)
jimthompson5910 (jim_thompson5910):
It turns out that the perimeters form the same ratio as the sides since the perimeter is simply the sum of all the sides
jimthompson5910 (jim_thompson5910):
we know that the ratio of the perimeters is 4:5, so 4/5 = 20/x Solve this for x to find the perimeter of the second polygon
OpenStudy (kymber):
Okay thaanks :p
jimthompson5910 (jim_thompson5910):
yw
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