Question 120537
The perimeter of the triangle is the sum of the 3 sides. 
Let x be side #1
Based on the information given, side #2 = x/2.
Based on the information given, side #3 = x-3.
Now, you can write an equation for the perimeter in terms of x:
{{{x+x/2+x-3=37}}}
Simplify:
{{{2x+x/2=40}}}
{{{5x/2=40}}}
{{{5x=80}}}
{{{highlight(x=16)}}}
That is the dimension of side #1. use the information given above to find side #2 and side #3. I will leave that part to you.
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Good Luck,
tutor_paul@yahoo.com