In the diagram below, de and ef are tangents to o. which equation could be solved to find y, the measure of dgf?

C) 1/2(y-127) = 53

Step-by-step explanation:

When an angle is formed by two secants, a secant and a tangent, or two tangents, the measure of the angle is equal to one-half of the difference between the intercepted arcs.

In this circle, our intercepted arcs are y° and 127°.  Their difference would be (y-127).  One-half of this would be 1/2(y-127).  The angle measure is 53; this gives us

1/2(y-127) = 53

all but the second one

step-by-step explanation:

cuz that one goes over 180

mark brainliest