SOLUTION: In a triangle ABC angleA is x angleB is 3x amd angleC is y.If 3y-5x=30,Show that the triangle is right angled

Algebra ->  Exponential-and-logarithmic-functions -> SOLUTION: In a triangle ABC angleA is x angleB is 3x amd angleC is y.If 3y-5x=30,Show that the triangle is right angled      Log On


   

Question 900352: In a triangle ABC angleA is x angleB is 3x amd angleC is y.If 3y-5x=30,Show that the triangle is right angled
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi

4x + y = 180   |Multiplying thru by 3

12x + 3y = 540

......

IF 3y = 5x+%2B+30

....

12x + 5x+30 = 540  |Substituting for y

  17x = 510

    x = 30

....

30,60,90 right Triangle