5
In a AABC, angle
C = 3, ZB = 2(2A + 2B), them 2B =?’​

1 thought on “5<br />In a AABC, angle<br />C = 3, ZB = 2(2A + 2B), them 2B =?’​”

1. In a triangle ABC angle C =3 angle B = 2 (angle A+ angle B). What are the three angles?
   

   
   

   C = 2(A+B)

   C = 3B, or

   2(A+B) = 3B, or

   2A+2B=3B, or

   B=2A.

   C =2(A+2A) = 6A

   A+2A+6A = 180 or 9A = 180.

   Or A = 20 deg. B = 40 deg, C = 120 deg.

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