How to prove that the sum of the 3 abgles of a triangle is 180^

1.	How to prove that the sum of the 3 abgles of a triangle is 180^
Answer» Draw a ?ABC. Then construct a line LM parallel to BC through point A. Angle 2 is equal to angle 4 by alternaye angle test. Angle 3 is equal to angle 5. Angle 1+4+5=180 (linear pair).replace the angle 4 by 2 and angle 5 by 3. Therefore by this we can say that tbe sum of all the angles of triangle =180 Advaita you solve this question by my method only because I solved this question early You are wrong this is not correct . We have to prove that ABC = 180 , that is angle 1,2,3 = 180 So why are you take 180 in first we have to prove this only as I write in the first ,ok Draw triangle ABC give name angle 1, 2 ,3 then construct a line xy at angle 1 . Then you can solve by linear pair angle . Let all the angles of atriangle be x =^A+^B+^C=180°Therefore;x+x+x=180°3x=180°X=180/3=60Hence tis proved tht all tge angles of atriangle is 180°Hope u get it ☺️

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