Question

The two parallelograms pictured below are similar. Find the unknown measure.

Answer 1

Seeing as they are similar shapes, you can divide the larger side length by the smaller one. In this case, 6.5 divided by 4.

6.4 ÷ 4 = 1.625.

Next, we write an equation using what we just learned. :)

13 = 1.625x

Divide both side by 1.625 to get 8 = x.

So the missing side length is 8.

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Answer 2

Since they are similar shape figures, that means that you can divide the larger side length by the smaller side length. So first do 6.5 divided by 4 to find the different in the shape sizes.
6.5/4=1.625
Now write an equation using this information.
13=1.625x
Divide both sides by 1.625.
8=x
So now you know that the missing side length is x=8.