SeanSoCute
SeanSoCute SeanSoCute
  • 03-10-2017
  • Mathematics
contestada

math experts only please help !

math experts only please help class=

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APAgony
APAgony APAgony
  • 03-10-2017
We can solve this using a system of similar right triangles. 

We have one triangle where the short leg is 12 and the long leg is x.
We have another triangle where the short leg is x and the long leg is 21.
We can set up a ratio to find the length of x.

12/x=x/21

Now we can just cross-multiply to find an answer.

x^2=12x21
x^2=252
x=15.87


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