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a bird is flying toward a large tree with a radius of 5 feet. when it is 27 feet from the center of the tree, its lines of sight form two tangents. what is the measure of the arc on the tree that the bird can see?
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Radii are tan to tan sgmts at pt of tangency. Tan sgmts from a pt are congruent. |dw:1332305343052:dw| You can use trig to find the angle of the triangle and then you can multiply by two to find the central angle, and central angles have the same measure as the arcs they intersect.
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