SOLUTION: Prove that sum of the three angles of a triangle is 1800 .Using the result, find the value of x and all the three angles of a triangle, if the angles are (2x – 7)0 , (x +25)0 an

Algebra ->  Angles -> SOLUTION: Prove that sum of the three angles of a triangle is 1800 .Using the result, find the value of x and all the three angles of a triangle, if the angles are (2x – 7)0 , (x +25)0 an      Log On


   

Question 1105524: Prove that sum of the three angles of a triangle is 1800
.Using the result, find the value of x and all the
three angles of a triangle, if the angles are (2x – 7)0
, (x +25)0 and (3x +12)0
Answer by ikleyn(52848) About Me  (Show Source):
You can put this solution on YOUR website!
.
Regarding the proof, see the lesson
    - Sum of the interior angles of a triangle
in this site.


Then

(2x-7) + (x+25) + (3x+12) = 180

6x + 30 = 180

6x = 180-30 = 150  ====>  x = 150%2F6 = 25 degrees.


Having this, find the angles on your own.