The length of the curved surface is the circumfrence of a circle with radius r = 10/2 = 5 decimeters.
Length of curved surface = 2π x 5 = 10π ≈ 31.4 decimeters.
A secant is simply a line that intersects the circle at exactly two points.
Therefore, line GH is a secant of circle
B since it intersects the circle ast 2 points.
