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omeli [17]
3 years ago
9

What is the perimeter of a triangle measuring 3 on each side?

Mathematics
2 answers:
ANTONII [103]3 years ago
8 0
Add them all up.
A triangle has 3 sides, and you said each side is 3. So:
3+3+3 = 9
geniusboy [140]3 years ago
8 0
The perimeter of a the triangle measuring 3 on each side is 9. cause you can do 3+3+3 and it is 9 or you can do 3x3 and still get 9 either way it is 9 XD
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We know that the perimeter of a rectangle is twice the length, plus twice the width.  

P = 2L + 2W  

We also know that the perimeter is 156.  

P = 156  

Finally, we know that the width is 12 less than the length.  

W = L - 12.  

The next thing that we do is substitute the information that we have into the original equation:  

P = 2L + 2W  

156 = 2L + 2(L - 12)  

From this point we start to solve  

156 = 2L + 2L - 24 <---we multiplied the '2' through the parenthesis  

156 + 24 = 2L + 2L - 24 + 24  

180 = 2L + 2L <--- getting like terms on same sides  

180 = 4L <---combining like terms  

180/4 = 4L/4 <--- getting like terms on same sides  

45 = L <---now we have a value for L  

Now we take the known value for L and substitute it in to our equation for W  

W = L - 12  

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W = 33  

So now we have Length = 45 and Width = 33.

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