True or false: in a study evaluating how long it takes subjects to attain a clinically significant response (e. g. the "event"), time-to-event analysis methods are used to integrate knowledge about

1) each subject's observed time-at-risk for the "event" and
2) whether or not the subject ultimately experienced the "event" during the study.

80° is the measure of gh

step-by-step explanation:

circle f is congruent to circle j

we have two circle with center f and j.

both circles are congruent. the radius of the circle would be equal.

see the attachment for the circle.

we are given ∠efd ≅ ∠gjh

therefore, arc (ed) = arc (gh)     (∴ circle f is congruent to circle j)

but ∠dfe=80°=arc (ed)

therefore, arc (gh) = 80°

thus, 80° is the measure of gh

cross multiplying, we get :

⇒ (3) × (5) = (9) × (x)

⇒ 15 = 9x