Pls help. quickly. if you get right then I will give 20 extra points. A. [1] Definition of right angles
[2] Third Angles Theorem
[3] Transitive Property of Congruence

B.[1] Definition of perpendicular lines
[2] Third Angles Theorem
[3] Reflexive Property of Congruence

C. [1] Definition of perpendicular lines
[2] Vertical Angles Theorem
[3] Symmetric Property of Congruence

D. [1] Definition of perpendicular lines
[2] Third Angles Theorem
[3] Symmetric Property of Congruence

21

step-by-step explanation:

yes the data was not prsented

step-by-step explanation:

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