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Mathematics 21 Online
OpenStudy (anonymous):

What is the value of a+b in this image?

OpenStudy (anonymous):

Image

OpenStudy (anonymous):

Ok. Do you first see that the right angle is a central angle?

OpenStudy (anonymous):

Ya

OpenStudy (anonymous):

Alright. Do you remember this theorem? |dw:1342967084667:dw| \[\angle a = \frac12 arcXY\]

OpenStudy (anonymous):

Seems familiar, but how would I incorporate that into this problem?

OpenStudy (anonymous):

Ok. Do you recognize this? |dw:1342967260103:dw|

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