Question

in triangle ABC, AB=AC and angleB=50 then find angle A

Answer 1

for isoceles two side is same so two angle will be same .
Angle B=Angle C =50
so Angle A+Angle B+AngleC =180 for
now Angle A+50+50=180
so Angle A=80

Answer 2

Answer:

In △ABC, AB=AC

           ⇒angleB=angleC=50degree

By the sum property of the triangle-

angleA+angleB+angleC=180degree

angleA+50+50=180degree

angleA=(180-100)degree=50degree  Ans.