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.

## Answer This Question

## Related Questions

- Geometry - 1. The sides of a triangle have lenghts x, x+4, and 20. Specify those...
- math plz check ;-; - A triangle has sides of lengths 5 cm, 5 cm, and square root...
- math plz check ;-; sorry - A triangle has sides of lengths 5 cm, 5 cm, and ...
- math plz help ;-; - A triangle has sides of lengths 5 cm, 5 cm, and square root ...
- geometry - the sides of a triangle have lengths 4x+1, 2x+1 and 6x-1. if the ...
- geometry inequality triangles help if you can - Two sides of an obtuse triangle ...
- geometry - find the value of x in each triangle: triangle x has 1 angle at 53 ...
- geometry - find the value of x in each triangle: triangle x has 1 angle at 53 ...
- Geometry - Given the lengths of the sides of a triangle, identify the triangle ...
- Geometry - The lengths of three sides of a triangle are given. Describe each ...

More Related Questions