Posted by **It** on Monday, March 5, 2012 at 10:41pm.

A triangle has sides x,x+7 , x+ 8. The value of x must fall between what boundaries to make this an obtuse triangle?

- geometry -
**Steve**, Tuesday, March 6, 2012 at 11:11am
any side of a triangle is less than the sum of the other two sides.

x < x+7 + x+8

-15 < x

no problem there

x+7 < x + x+8

-1 < x

no problem there

x+8 < x + x+7

1 < x

so, as long as x is at least 1, the three values could form a triangle.

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