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Tangents and Parallelogram

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by rahulvsd » Wed Oct 19, 2011 9:40 am
In the figure shown, line segments AB and AC are tangent to the circle (line segments tangent to a circle originating at a common point are congruent.) Additionally AB and CD are congruent and parallel. What is the measure of angle y?


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Source: — Data Sufficiency |
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by sl750 » Wed Oct 19, 2011 9:54 am
45+90+y=180; y=45
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by shankar.ashwin » Wed Oct 19, 2011 9:57 am
Extend Line AB, to Angle DA'O' would also be 45.(Parallel to BC)

Hence 90+y+45=180
y=45
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