itsangie itsangie
  • 01-06-2018
  • Mathematics
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I have finals tomorrow lol. If you guys could teach me how to do this you’d be amazing

I have finals tomorrow lol If you guys could teach me how to do this youd be amazing class=

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dolphinguy21 dolphinguy21
  • 01-06-2018
How do you find perimeter in general?  You add up all the sides. So, let's do that. 2r+5+2r+4r-3+r=  6r+2. So, the perimeter is equal to 6r+2. But wait it is also equal to 38 (it is in the question). So, if both are the perimeter, they are the same. So, set them equal to each other.  

6r+2=38
6r=36
r=6
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