1-Determinate-then-show-that-I-belong-to-the-circle-2-show-that-BF-DI-

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

1) D e t e r m i n a t e α t h e n s h o w t h a t I b e l o n g t o t h e c i r c l e

2) s h o w t h a t (B F) ⊥ (D I) .

Commented by 1549442205PVT last updated on 25/Jul/20

BF ⊥ DI, have not BF ⊥ DE you look at

once again your figure ?

Commented by mathocean1 last updated on 25/Jul/20

y e s s i r i t w a s a n e r r o r .

S h o w t h a t B F ⊥ D I

Commented by mr W last updated on 25/Jul/20

s e e Q 104998

Commented by 1549442205PVT last updated on 28/Jul/20

It is easy becau se we proved that I

lie on the circle . Then \hat{BID} = 90 ° since

BD is the diameter of the circle .