Fill in the blank with the phrase that makes the proof statement true.

Lines m and n are parallel. Angle 1 is congruent to angle 2 by the Corresponding Angles Postulate. Angle 1 is congruent to angle 3 because they are vertical angles. by the Transitive Property.

A. Angle 2 is congruent to angle 3

B. Angle 3 is supplementary to angle 1

C. Angle 2 is congruent to angle 1

D. Angle 1 is complementary to angle 2

yes

step-by-step explanation:

yes

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