Question

prove sum of angles of a triangle is 180°​

Answer 1

Answer:

í hαvє αttαchєd thє ímαgє nσw чσu cαn gσ thrσugh thє ímαgєѕ αnd clєαr чσur dσuвtѕ.

Answer 2

DE||BC

angle 1=angle 4(by alternate interior angle)

angle 3=angle 5(by alternate interior angle)

angle 1 +angle 2 +angle 3 =180°

angle 4+ angle 2 +angle 5=180°

ABC+ BAC+ ACB=180°

PROVED