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# similar polygons

0
141
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Solve for x.  The polygons in each pair are similar.

scale factor from A to B = 1:3.

Feb 25, 2021

#1
+8455
+1

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

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Feb 25, 2021
#2
+112823
0

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.

Feb 28, 2021