As shown in the figure, given that point E is on the edge ab of △ ABC, point D is on the extension line of Ca, and point F is on the extension line of BC, what is the size relationship between ∠ ACF and ∠ D? Please give reasons

As shown in the figure, given that point E is on the edge ab of △ ABC, point D is on the extension line of Ca, and point F is on the extension line of BC, what is the size relationship between ∠ ACF and ∠ D? Please give reasons

The reason is as follows: ∵ BAC is the outer angle of △ ade, ∵ BAC > D, ∵ ACF is the outer angle of △ ABC, ∵ ACF > BAC, so ∵ ACF > D