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OpenStudy (anonymous):
In the diagram below, P is circumscribed about quadrilateral ABCD. What is the value of x? http://assets.openstudy.com/updates/attachments/53d261a7e4b0f2f7e5e8c1cb-lilcrunch-1406296497453-b407d5933bfc424d88c9328205fb3ce1.gif
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OpenStudy (anonymous):
OpenStudy (crashonce):
Well you use the fact that opposite angles of a cyclic quad are supplementary
OpenStudy (anonymous):
how would you write that
OpenStudy (crashonce):
70 + x + 10 = 180 (opposite angles of a cyclic quadrilateral are supplementary) Therefore x=180-80 Therefore x=100
OpenStudy (anonymous):
thats what i got
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OpenStudy (anonymous):
thanks
OpenStudy (crashonce):
no worries
OpenStudy (anonymous):
ive got another one
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