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12-06-2018
Mathematics

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In the diagram of circle O, what is the measure of <abc?

In the diagram of circle O what is the measure of ltabc class=

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Banabanana Banabanana

12-06-2018

The angle formed by the intersection of 2 tangents outside the circle equals half the difference of the intercepted arcs.

near arc = 150°
far arc = 360 - 150 = 210°

m∠ABC = (210 - 150)/2 = 30°

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