SOLUTION: the length of of a triangle are x cm ,{x+1} and {x+2}cm determine x so that this triangle is the right angled triangle . thank you in advance this question is from the book m

Algebra ->  Pythagorean-theorem -> SOLUTION: the length of of a triangle are x cm ,{x+1} and {x+2}cm determine x so that this triangle is the right angled triangle . thank you in advance this question is from the book m      Log On


   

Question 421485: the length of of a triangle are x cm ,{x+1} and {x+2}cm determine x so that this triangle is the right angled triangle .
thank you in advance
this question is from the book mathematics 6th edition written by teh keng seng
Answer by edjones(8007) About Me  (Show Source):
You can put this solution on YOUR website!
a^2+b^2=c^2
x^2+(x+1)^2=(x+2)^2
x^2+x^2+2x+1=x^2+4x+4
x^2-2x-3=0
(x-3)(x+1)=0
x=3
.
Ed