SOLUTION: Hi ok please answer this question fast thank yousom uch My book has the answer but idk how that makes sense so heres the question: measurement angle A=3y, and measurement angle B=

Algebra ->  Angles -> SOLUTION: Hi ok please answer this question fast thank yousom uch My book has the answer but idk how that makes sense so heres the question: measurement angle A=3y, and measurement angle B=      Log On


   

Question 655253: Hi ok please answer this question fast thank yousom uch
My book has the answer but idk how that makes sense so heres the question: measurement angle A=3y, and measurement angle B=2(measurement angle A) whoch value of Y makes angle A supplementary to Agle B ?? i have 4 options( multiple choice) 10,18,20,36 the book says 20 ..but how ??
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

A = 3y

B = 2A   

B = 2%2A3y+=+6y

Angles supplementary: 

  A + B =  180°

 3y + 6y = 180°

     9y = 180°

      y = 20°