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Mathematics 10 Online
OpenStudy (anonymous):

Lines CD and DE are tangent to circle A shown below. If arc CE is 126°, what is the measure of ∡CDE?

OpenStudy (anonymous):

OpenStudy (anonymous):

They are supplementary angles

OpenStudy (mertsj):

If arc CE is 126, the major arc is 360 - 126 and the desired angle is 1/2 the difference of the arcs.

OpenStudy (anonymous):

\[\angle CAE+\angle CDE=180\]

OpenStudy (anonymous):

So the answer would be 117?

OpenStudy (mertsj):

No. 54

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