Question

in triangle abc ab=ac angle a=60 degrees find angle b and c​

Answer 1

we know that two angels of isosceles triangle are same. so angle b=c

in triangle ABC angels

a+b+c=180

60+c+c=180

2c=120

c=60

b=c=60

Answer 2

angle sum property
let B=C=x
A+B+C= 180
60+B+C = 180
B+C =180-60
x+x=120
2x = 120
$x = \frac{120}{2}$
x=60
therefore A=60,B=60,C=60