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Math·Geometry and Trigonometry·Circles
hard
The circle shown has center , and points , , and lie on the circle. Line is tangent to the circle at point , and line is parallel to line segment (not shown). Line (not shown) intersects line at point , and line (not shown) intersects line at point . If the length of line segment is and the length of line segment is , what is the perimeter of triangle ?
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