which angle has the largest angle measure, and what is its angle degree

Question

If triangle abc has angle measures angle a=3x degrees, angle b=x+5, and angle c= x-15

Answer 1

3x + x + 5 + x - 15 = 180

 

Can you solve for x and answer?

Answer 2

Hi Hannah,

 

Add the three expressions together and set it equal to 180

 

3x + x + 5 + x - 15 = 180

 

5x - 10 = 180

 

5x = 190

 

x = 38

 

angle a is the largest

its measure is 114º  (angle b = 43, angle c = 23)