Question

prove that sum of three angle of a triangle equal to two right angle

Answer 1

Sum of angles of triangles =(2n-4)*90

Sum of angles of triangles =(2*3-4)*90=(6-4)90

Sum angle of triangles =180°

Two 90° angles =90*2=180°

180=180

Answer 2

let a triangle ABC in which angle A + Angle B + angle c equal to 180 degree by angle sum property
$in \: rhs \: we \: can \: also \: write \: it \: 2 \times 90and \: one \: 90 \: degree \: is \: equal \: to \: one \: right \: therefore \:$
angle A + Angle B + angle c equal to 2 into right angle