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The shaded portion of the figure represents a tunnel's semicircular entrance with center C. How many feet high is the entrance at the point on the horizontal line L that is 10 feet from C?
(1) The diameter of the entrance is 60 ft.
(2) The entrance is 24 feet hight at a point on L that is 18 feet from C.
Tunnel.JPG [ 2.52 KiB | Viewed 1046 times ]