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5 votes
X=_?
please help. this assignment makes no sense and i cant find any helpful videos.

X=_? please help. this assignment makes no sense and i cant find any helpful videos-example-1
User Njjnex
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See "intersecting secants theorem" (you should be able to find a variant that specifically applies to arc measures). It says that for this circle,


30^\circ=\frac{x-40^\circ}2\implies x=100^\circ

User Kronass
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