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# helppppp

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A triangle is made of wood sticks of lengths 8, 15 and 17 inches joined end-to-end. Pieces of the same integral length are cut from each of the sticks so that the three remaining pieces can no longer form a triangle. How many inches are in the length of the smallest piece that can be cut from each of the three sticks to make this happen?

Mar 27, 2018

#1
+8962
+2

If we took off  1  inch from each stick, we'd have sticks of length

7, 14, and 16

For these to be the lengths of the sides of a triangle, the sum of the smallest two sides must be greater than the third side.

7 + 14 > 16

21 > 16          this is true, so  7, 14, and 16 can be the sides of a triangle.

So.....we want to know the smallest integer  n  such that....

(8 - n) + (15 - n)   is NOT greater than   17 - n

(8 - n) + (15 - n)  ≤  17 - n

23 - 2n  ≤  17 - n

23  ≤  17 + n

6  ≤  n

n  ≥  6

We want to know the smallest integer  n  such that  n ≥ 6  .

The smallest number that is greater than or equal to 6 is  6 .

The smallest piece that needs to be cut from each of the sticks is 6 inches long.

Mar 27, 2018

#1
+8962
+2

If we took off  1  inch from each stick, we'd have sticks of length

7, 14, and 16

For these to be the lengths of the sides of a triangle, the sum of the smallest two sides must be greater than the third side.

7 + 14 > 16

21 > 16          this is true, so  7, 14, and 16 can be the sides of a triangle.

So.....we want to know the smallest integer  n  such that....

(8 - n) + (15 - n)   is NOT greater than   17 - n

(8 - n) + (15 - n)  ≤  17 - n

23 - 2n  ≤  17 - n

23  ≤  17 + n

6  ≤  n

n  ≥  6

We want to know the smallest integer  n  such that  n ≥ 6  .

The smallest number that is greater than or equal to 6 is  6 .

The smallest piece that needs to be cut from each of the sticks is 6 inches long.

hectictar Mar 27, 2018