Homework Help: geometry

Posted by ken on Thursday, October 28, 2010 at 8:54pm.

The perimeter of a triangle is equal to 12 inches. The length of the longest side is equal to the sum of the other two sides minus 2. If you add 2 to the shortest side, it will equal the longest side. Find the side lengths.

geometry - Reiny, Thursday, October 28, 2010 at 9:45pm
let ..

shortest side ---- x
longest side ---- x+2
middle side ----- y

"The length of the longest side is equal to the sum of the other two sides minus 2"

x+2 = x+y-2
y = 4

x + x+2 + y = 12
2x + 6 = 12
x = 3

sides : 3, 4, and 5

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