The sides of a triangular lot are represented by x, 3x, and 3x + 2. find each side if the perimeter is 632 feet.

Perimeter of triangle is adding all three sides.
For example a triangle with sides 3, 5, and 7 would have a perimeter of 15

Now we use your values.

632 = (x) + (3x) + (3x + 2)
632 = 7X + 2
630 = 7x
90 = X

So side 1 is 90
Side 2 is 3(90) or 270
Side 3 is 3(90) + 2 or 272
Add all those up and you get (you guessed it) 632

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The mode of the numbers is 29.