Shown below, in hours, are how long it took 4 friends to swim different distances. Calculate the speed of each person as a unit rate then order them from the slowest to the fastest. (The person you identified as the slowest should be listed first, the person who is the fastest will be at the end)

i believe it's a.

i'm not sure on this one, most likely correct.

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