What is the pre-image of vertex a' if the image shown on the graph was created by a reflection across the line y = x?
(10,-2)
(-10,2)
(-2,-10)
(2, 10)

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

b. f(x) = –√x + 3this is the correct answer