SOLUTION: In ∆ABC, m∠A = 3x + 1, m∠B = 4x - 17,and m∠C = 5x - 20. Which type of triangle is ∆ABC?

Algebra ->  Triangles -> SOLUTION: In ∆ABC, m∠A = 3x + 1, m∠B = 4x - 17,and m∠C = 5x - 20. Which type of triangle is ∆ABC?      Log On


   

Question 877561: In ∆ABC, m∠A = 3x + 1, m∠B = 4x - 17,and m∠C = 5x - 20. Which type of triangle is ∆ABC?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
A%2BB%2BC=180
3x%2B1%2B4x-17%2B5x-20=180
12x=216
x=18
A=3x%2B1=54%2B1=55
B=4x-17=72-17=55
C=5x-20=70
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ABC is an isosceles triangle.