Question

show that triangle ABC is isosceles if Angle B equal to 30 degree angle c equal to 120 degree​

Answer 1

Answer:

angle a also 30° so angles equal sides also equal

Step-by-step explanation:

by angle sum property of a triangle 180°

A°+B°+C°=180

A°+30+120=180

A°=180-150

A°=30

since angles are equal so respective sides are also equal hence it is an isosceles triangle.....

Answer 2

30+50=180degree

30+50=180degree80 =180

30+50=180degree80 =180180-80= 100 degree