Which of the following is a secant on the circle below?
A. SU
B. RT
C. SU
D. UT

The secant of circle is SU and RT.
A straight line that intersects a circle in two points is called a secant line.
From the given diagram,
The line which intersects the circle at two points or an extended chord is SU and RT.
Hence, secant is SU and RT.
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