A hummingbird, represented by point H, is flying toward a tree that has a radius of 2 feet. The circle shown represents the circumference of the tree, with point C representing the center of the tree. When it is 8 feet from the center of the tree, the hummingbird's peripheral vision forms two tangents. Select the two locations that would need to be connected to construct the peripheral line of sight from the hummingbird's right eye. Then select the value that is the best approximation of the tangent length.