if anyone tell me 13 question
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BD=EC _1(given)
angle B= angle D(corresponding angle)
angle C= angle E( same)
D=E
AD=AE _2
from eq 1&2
BD+AD=EC+AE
AB=AC
so it is isosceles triangle
angle B= angle D(corresponding angle)
angle C= angle E( same)
D=E
AD=AE _2
from eq 1&2
BD+AD=EC+AE
AB=AC
so it is isosceles triangle
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