Question

please answer the question guys please

Answer 1

angles opposite to equal sides are equal....
so let it be x
then by angle sum property...
2x+100=180°
x=40°
hence <B=<C=40°

Answer 2

we know that in triangle given AB= AC

such as,angle B= angle C

so ,angle(A+B+C)= 100

and given A= 100

now ,180-100=80
2anlge B= 80

angle B= angle C

so 80/2= 40

angle B= angle C= 40°

hope it help you