What is the reason for the step taken from the proof below?
HELP

a reflection across the x-axis , followed by the by a reflection across the y-axis , and then a scale dilation of 0.5 .

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

the answer is 40.

proof:

answer is c

step-by-step explanation:

81/12=324/x

x=48