Lines CD and DE are tangent to circle A shown below:

Lines CD and DE are tangent to circle A and intersect at point D. Arc CE measures 126 degrees. Point B lies on circle A.

If Arc CE is 126°, what is the measure of ∠CDE?
126°
63°
117°
54°

Question

Lines CD and DE are tangent to circle A shown below:

Lines CD and DE are tangent to circle A and intersect at point D. Arc CE measures 126 degrees. Point B lies on circle A.


If Arc CE is 126°, what is the measure of ∠CDE?
 126° 
63° 
117° 
54°

christina166 · Answer

attachment

christina166 · Answer

Anyone, please I really don't get it

nikato · Answer

http://www.regentsprep.org/regents/math/geometry/gp15/circleangles.htm you can look at 5

christina166 · Answer

Thank you so much!!!

nikato · Answer

all you have to do is find the measure of arc CBE

christina166 · Answer

So I divide it by 1/2

nikato · Answer

which is 360-126
then subtract by 126.
then divide by 2
and get your answer

christina166 · Answer

Thank you!!!! Your the best, I feel really stupid I have been stuck on this all day!

nikato · Answer

*its actually multiply by 1/2 not divide by 1/2

dividing by 1/2 means multiplying by 2

nikato · Answer

and no problem! glad to help you

christina166 · Answer

Ok thanks!