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kvv77 [185]
3 years ago
13

In the diagram below DE and EF are tangent to O what is the measure of DF​

Mathematics
2 answers:
fenix001 [56]3 years ago
8 0
Answer starts with 1/2
marysya [2.9K]3 years ago
3 0

Answer:

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

hope this helps c:

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