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 6x1. 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