SOLUTION: i need your help to solve this problem: if the side lengths of a triangle are 4, 15, 25, the triangle is a? a. an obtuse triangle b. an acute triangle c. a right triangle d.

Question 822014: i need your help to solve this problem: if the side lengths of a triangle are 4, 15, 25, the triangle is a?
a. an obtuse triangle
b. an acute triangle
c. a right triangle
d. cannot be formed
Answer by Edwin McCravy(20054) (Show Source): You can put this solution on YOUR website!
4, 15, 25

We use the fact that in a triangle, 

the longest side must be shorter than the sum of the two 
shorter sides.

So since the sume of the two shorter sides would be 4+15=19,
and 25 is NOT shorter than 19, no triangle can be formed.

Edwin

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