Question

please answer the question

Answer 1

Let the angles of the triangle be A, B and C
By angle sum property
A+B+C= 180
In an isosceles triangle the base angles are equal.
So B=C
A+2B=180
According to the question
A= 2(B+C)
A=2(2B)
A=4B
Substituting the value of A
4B+2B= 180
6B=180
B=30
C=30
A=60