Question

ABCD is a parallelogram. A circle passes through A and D and cuts AB at E and DC at F.Given that angle BEF=80°, find angke ABC?

Answer 1

BEF=80°
AEF=100°
So, EFC=100°
then, EBC =80°

Answer 2

let angle FEA 100 soLata angle x 100 degree so Angle B equal 200 degree because of the interior alternate angles so by directly Angle B equal to 80 degree