similar polygons

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Solve for x. The polygons in each pair are similar.

scale factor from A to B = 1:3.

Guest Feb 25, 2021

MaxWong · Answer 1 · 2021-02-25T05:13:43

$(2x - 16) : 12 = 1 : 3\\ 2x - 16 = 4\\ x = 10$

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Melody · Answer 2 · 2021-02-28T01:02:21

OR

If the scale factor of the area is 1:3

then the scale factor of the side length is 1:sqrt(3)

so

$\frac{\sqrt3}{1}=\frac{12}{2x-16}$

now solve it for yourself.