Question Number 105014 by mathocean1 last updated on 25/Jul/20

1)Determinate α then show that I belong to the circle  2) show that (BF)⊥(DI).

Commented by1549442205PVT last updated on 25/Jul/20

BF⊥DI ,have not BF⊥DE you look at  once again your figure?

Commented bymathocean1 last updated on 25/Jul/20

yes sir it was an error.  Show that BF⊥DI

Commented bymr W last updated on 25/Jul/20

see Q104998

Commented by1549442205PVT last updated on 28/Jul/20

It is easy becau se we proved that I  lie on the circle.Then BID^(�) =90° since  BD is the diameter of the circle.