# GEOMETRY(POLYGON)

A regular polygon has interior angles of 150∘. A,B,C,D are 4 consecutive points of this polygon. What is the measure (in degrees) of ∠ADC?

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3. 👁 250
1. 150n = 180(n-2)
n = 12

So, the figure is a 12-gon
That should get you started

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2. 30 degrees

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