Question

Two circles ABCD amd ABEF intersect each other at point mt A and B. If CBE and DAF are straight lines prove that CD is parallel to EF.

Answer 1

hope this answer helps you

Answer 2

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DE is chor in the circle O1, and CF is chord in the circle O2

O1M is ⊥ on ED that EM = MD....(i)

O2M is ⊥ on CF so that CM = MF....(ii)

CM=MF

EM+CD=MD+EF

CD=EF=4.5

EF=4.5

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